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Cho 8.16 g hỗn hỗn Ag Cu vào 1 ly vừa đủ hỗn hợp H2SO4 đặc nóng thu đc v lít SO2 ở đktc.lượng SO2 trên đc hấp thụ hoàn toàn vào 200 ml dd NaOH 1 M. Cô cạn dd sau pư đc 11.68 g chất rắn khan a) tính v b) tính %khối lg mỗi kloại
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