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		<h1>Hướng dẫn giải bài tập SGK Hoá học lớp 12 bài 37&#x3A; Luyện tập Tính chất hóa học của sắt và hợp chất của sắt</h1>
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			Hướng dẫn giải bài tập SGK Hoá học lớp 12 bài 37: Luyện tập Tính chất hóa học của sắt và hợp chất của sắt
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			<p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><strong style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Bài 1 (trang 165 SGK Hóa 12): Điền công thức hóa học của chất vào những chỗ trống và lập các phương trình hóa học sau:</strong></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">a. Fe + H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>đặc → SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ ………</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">b. Fe + HNO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>đặc → NO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ ………</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">c. Fe + HNO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>loãng → NO + ………</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">d. FeS + HNO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;→ NO + Fe<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>(SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ ………</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><u><em><strong>Giải:</strong></em></u></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">2Fe + 6H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>(d) → 3SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ Fe<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>(SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ 6H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Fe + 6HNO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>(d) → 3NO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ Fe(NO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ 3H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Fe + 4HNO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>(l) → NO + Fe(NO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ 2H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">3FeS + 12HNO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;→ 9NO + Fe<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>(SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ Fe(NO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ 6H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><strong style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Bài 2 (trang 165 SGK Hóa 12): Bằng phương pháp hóa học, hãy phân biệt 3 mẫu hợp kim sau:</strong></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Al – Fe; Al – Cu ; Cu – Fe.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><u style="color: rgba(0, 0, 0, 0.87); font-family: Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;"><em><strong>Giải:</strong></em></u></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Cho dung dịch NaOH vào 3 mẫu hợp kim, mẫu thử nào có khí thoát ra là Al-Fe và Al-Cu, mẫu thử nào không có khí thoát ra là Cu-Fe</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">2Al + 2NaOH + 6H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O → 2Na[Al(OH)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>] + 3H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Cho dung dịch HCl đến dư vào hai mẫu thử trên, mẫu thử nào không hòa tan hết là Al-Cu, mẫu thử nào tan hết là Al-Fe</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">2Al + 6HCl → 2AlCl<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ 3H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Fe + 2HCl → FeCl<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><strong style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Bài 3 (trang 165 SGK Hóa 12): Một hỗn hợp bột gồm Al, Fe, Cu, Hãy trình bày một phương pháp hóa học để tách từng kim loại ra khỏi hỗn hợp đó. Viết các phương trình hóa học của các phản ứng.</strong></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><u style="color: rgba(0, 0, 0, 0.87); font-family: Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;"><em><strong>Giải:</strong></em></u></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Cho dung dịch NaOH dư vào hỗn hợp 3 kim loại thu được hai phần.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">- Phần dung dịch là NaAlO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;và NaOH dư</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">- Phần chất rắn là Cu và Fe</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Al + NaOH + H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O → NaAlO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ 3/2H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Lấy phần dung dịch dẫn CO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;đến dư thu được kết tủa Al(OH)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>. Lọc lấy kết tủa đem nung ngoài không khí đến khối lượng không đổi thu được chất rắn là Al<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>. Điện phân nóng chảy Al<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;ta được Al.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">NaAlO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ CO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O → NaHCO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ Al(OH)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;↓</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">CO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ NaOH → NaHCO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">CO2 + NaOH → Na2CO3 + H2O</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">2Al(OH)<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;→ Al<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;+ 3H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">2Al<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>O<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">3</sub>&nbsp;→ 4Al + 3O<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Phần chất rắn đem hòa tan trong HCl dư, thu được dung dịch là FeCl<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>, còn phần chất rắn là Cu. Điện phân dung dịch thu được ta được Fe.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Fe + 2HCl → FeCl<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;+ H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">FeCl<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;→ Fe + Cl<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><strong style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Bài 4 (trang 165 SGK Hóa 12): Cho một ít bột sắt nguyên chất tác dụng hết với dung dịch H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>&nbsp;loãng thu được 560 ml một chất khí ở đktc. Nếu cho một lượng gấp đôi bột sắt nói trên tác dụng hết với dung dịch CuSO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>&nbsp;thì thu được một chất rắn. Tính khối lượng bột sắt đã dùng trong hai trường hợp nói trên và khối lượng chất rắn thu được.</strong></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><u style="color: rgba(0, 0, 0, 0.87); font-family: Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;"><em><strong>Giải:</strong></em></u></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Số mol H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>&nbsp;là n<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;"><img alt="H_2" class="data-latex" data-i="0" data-latex="H_2" height="14" src="https://chart.apis.google.com/chart?cht=tx&amp;chl=H_2" style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit; height: auto; max-width: 100%;" width="19" /></sub>&nbsp;= 0,56 / 22,4 = 0,025 (mol)</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Fe + H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>&nbsp;→ FeSO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>&nbsp;+ H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Theo pt n<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Fe</sub>&nbsp;= n<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;"><img alt="H_2" class="data-latex" data-i="1" data-latex="H_2" height="17" src="https://sachgiai.com/uploads/news/2018_06/chart_7.png" style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit; height: auto; max-width: 100%;" width="23" /></sub>&nbsp;= 0,025(mol) → mFe = 0,025 x 56 = 1,4(g)</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Lượng Fe gấp đôi khi đó số mol Fe là : 0,05 (mol)</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Fe + CuSO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>&nbsp;→ FeSO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>&nbsp;+ Cu</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">n<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Fe</sub>&nbsp;= 0,05 mol.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Khối lượng Fe đã dùng m<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Fe</sub>&nbsp;= 0,05 x 56 = 2,8 (g)</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Khối lượng chất rắn m = m<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Cu&nbsp;</sub>- m<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Fe</sub>&nbsp;= 0,05 x 64 – 0,05 x 56 = 0,4(g)</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><strong style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Bài 5 (trang 165 SGK Hóa 12): Biết 2,3 gam hỗn hợp gồm MgO, CuO, FeO tác dụng vừa đủ với 100ml dung dịch H<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">2</sub>SO<sub style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">4</sub>&nbsp;0,2M. Khối lượng muối thu được là:</strong></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">A. 3,6 gam.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">B. 3,7 gam.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">C. 3,8 gam.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">D. 3,9 gam.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><u style="color: rgba(0, 0, 0, 0.87); font-family: Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;"><em><strong>Giải:</strong></em></u></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Đáp án D.<br  /><strong style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;"><img alt="Luyện tập Tính chất hóa học của sắt và hợp chất của sắt" class="lightbox" data-i="2" height="231" src="https://sachgiai.com/uploads/news/2018_06/giai-bai-tap-hoa-hoc-12-bai-37-luyen-tap-tinh-chat-hoa-hoc-cua-sat-va-hop-chat-cua-sat-1.jpg" style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit; cursor: zoom-in; height: auto; max-width: 100%;" width="402" /></strong></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><strong style="margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit; font-family: inherit;">Bài 6 (trang 165 SGK Hóa 12): Nguyên tử của nguyên tố X có tổng số hạt cơ bản (p,n,e) là 82, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 22. Nguyên tố X là nguyên tố nào?</strong></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">A. Sắt.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">B. Brom.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">C. Photpho.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">D. Crom.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;"><u style="color: rgba(0, 0, 0, 0.87); font-family: Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;"><em><strong>Giải:</strong></em></u></p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Đáp án A.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Gọi p, n, e lần lượt là số proton, notron và electron.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">Ta có p + n + e = 82.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">p + e - n = 22.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">→ p = e = 26 ; n = 30.</p><p style="margin: 0px; padding: 0px 0px 8px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: Arial, Helvetica, sans-serif; color: rgba(0, 0, 0, 0.87); text-align: justify;">X là Fe.</p>
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