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Nguyenducduy
2 năm trước
Cho 24g hỗn hợp X gồm Cu và Fe tác dụng hoàn toàn với 1 lượng vừa đủ dung dịch H2SO4 đặc, nóng.Sau phản ứng được 11.2 lít SO2 và dung dịch A. a) % khối lượng Cu và Fe trong hỗn hợp X b) Cho dung dịch A tác dụng hết V(ml) dung dịch KOH 1M thì thu được m(g) kết tủa. Tìm V và m Giúp mình câu b với
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