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transoan1980
2 năm trước
Câu 23: Cho 4,05 gam nhôm và 4,8 gam lưu huỳnh vào bình kín không có không khí sau đó đốt nóng hỗn hợp đến khi phản ứng xảy ra hoàn toàn ta thu chất rắn X. Hòa tan chất rắn X bằng dd HCl dư có nồng độ 1 M (biết dd HCl đã lấy dư 10% so với lượng cần dùng) ta thu dd A và khí B. Lấy dd A tác dụng với 500 ml dd KOH 1 M ta thu được kết tủa C. Xác định phần trăm thể tích các chất có trong B, khối lượng kết tủa C và thể tích dd HCl đã dùng?
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