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hoa187192
2 năm trước
Trộn một dung dịch có hoà tan 0,2 mol CuCl2 với một dung dịch có hòa tan 20g NaOH . Lọc hỗn hợp các chất sau phản ứng, thu được kết tủa và nước lọc. Nung kết tủa đến khi khối lượng không đổi. a. Viết các phương trình hoá học xảy ra. b. Tính khối lượng chất rắn thu được sau khi nung. c. Tính khối lượng các chất tan có trong nước lọc
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