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ntbhang88
2 năm trước
Một loại đá chứa 80% CaCO 3 ; 10,2% Al 2 O 3 và 9,8% Fe 2 O 3 . Nung đá ở nhiệt độ cao sau một thời gian thu được chất rắn có khối lượng bằng 78% khối lượng đá trước khi nung. a) Tính hiệu suất phản ứng phân hủy CaCO 3 ? b) Tính % khối lượng CaO trong đá sau khi nung? c) Cần dùng bao nhiêu ml dd HCl 0,5M để hòa tan vừa đủ 10g đá sau khi nung; Giả sử các phản ứng hòa tan xảy ra dễ dàng.
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