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nguyentiendungnotyourcomputer
2 năm trước
Hòa tan 28 gam hỗn hợp gồm Mg , Fe , Cu trong dd HCl dư, thu được dd X và 11,2 lit khí đo ở đktc, còn lại 9,6 g chất rắn sau phản ứng. Tính khối lượng mỗi kim loại trong hỗn hợp. Cho dd X vào dd NaOH (lấy dư). Lọc lấy kết tủa đem nhiệt phân đến khối lượng không đổi. Tính khối lượng chất rắn thu được.
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