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buitinh89
2 năm trước
Cho 12,1g hỗn hợp sắt và kẽm phản ứng hoàn toàn với dung dịch H2SO4 loãng, dư thì thu được 4,48 lít khí (đktc). a. Tính %m mỗi kim loại trong hỗn hợp ban đầu? b. Tính V dung dịch axit H2SO4 0,1M đã dùng? c. Nếu cho hỗn hợp trên vào dung dịch H2SO4 đặc nóng thì thu được bao nhiêu lít khí lưu huỳnh đioxit ở đktc? d. Lấy hỗn hợp trên tác dụng vừa đủ với 10,0 ml dung dịch H2SO4 đặc nguội , tính V khí SO2(đktc) và CM các chất trong dung dịch sau phản ứng?
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