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pewpewpilots
2 năm trước
Một dd (A) chứa H2so4 và HCl ở cùng nồng độ mol Cho hh (X) gồm Fe,Mg và Zn.Làm 2 thí nghiệm: TN1:Cho m gam X tác dụng với 300g dung dịch A thu được 8,96 lít H2 TN2:Cho m gam X tác dụng với 600ml dung dịch A thu được 11,2 lít H2 a)Chứng tỏ rằng thí nghiệm 1 axit hết và X chưa tan hết;còn trong thí nghiệm 2 axit dư và X tan hết.Khối lượng m của X dùng trong các thí nghiệm đó nằm giữa hai giới hạn nào? b)Cho m=23,4gam.Khối lượng muối nằm ở giới hạn nào?
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