Câu 1 cho 7,2g kim loại mg phản ứng hoàn toàn vs dung dịch hcl 6MY (cd=1,2g/ml) xác định thể tích dung dịch cần dùng Câu 2cho 7,2g kim loại mg phản ứng hoàn toàn vs 120dung dịch hcl (cd=1,2g/ml) xác định nồng độ mol/lít dung dịch HCl cần dùng

2 câu trả lời

nMg=$\frac{7,2}{24}$ =0,3 mol

Mg+2HClMgCl2+H2

 nHCl=0,6 mol

V HCl=$\frac{0,6}{6}$ =0,1l=100ml

 

Đáp án:Giải thích các bước giải:

 câu 1 

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