Bài 12: Oxide
Luyện tập trang 60 KHTN lớp 8
<p><strong>Luyện tập trang 60 Khoa học tự nhi&ecirc;n 8:</strong>&nbsp;H&atilde;y chọn oxide v&agrave; acid tương ứng, viết phương tr&igrave;nh ho&aacute; học tạo ra c&aacute;c muối sau:</p> <p>a) CaCl<sub>2</sub>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) MgSO<sub>4</sub>.</p> <p>c) FeCl<sub>2</sub>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d) Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>.</p> <p><strong>Trả lời:</strong></p> <p>a) CaO + 2HCl &rarr; CaCl<sub>2</sub>&nbsp;+ H<sub>2</sub>O</p> <p>b) MgO + H<sub>2</sub>SO<sub>4</sub>&nbsp;&rarr; MgSO<sub>4</sub>&nbsp;+ H<sub>2</sub>O</p> <p>c) FeO + 2HCl &rarr; FeCl<sub>2</sub>&nbsp;+ H<sub>2</sub>O</p> <p>d) Fe<sub>2</sub>O<sub>3</sub>&nbsp;+ 3H<sub>2</sub>SO<sub>4</sub>&nbsp;&rarr; Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>&nbsp;+ 3H<sub>2</sub>O.</p>
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