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huynhnono1
2 năm trước
Hòa tan hoàn toàn a gam hỗn hợp gồm Cu và Fe ( Fe chiếm 30% về khối lượng ) bằng 50ml dung dịch H2SO4 98% (d=1,4g/ml) . Sau khi phản ứng xảy ra hoàn toàn thu được chất rắn X nặng 0,75a gam, dụng dịch Y và 6,104 l SO2 (đktc). Tính khối lượng muối trong dung dịch Y.
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