Hòa tan hoàn toàn 1,08 gam kim loại M (hoá trị III) trong 200 ml dung dịch HCl1M thu được V lít khí (đktc) và dung dịch A. Để trung hòa lượng axit dư trong A phải dùng hết 80ml dung dịch NaOH 1M. Xác định kim loại M và tính thể tích V?

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