Một dung dịch chứa 7,665 gam HCl. Cho 16 gam CuO vào đó và khuấy đều a) Sau phản ứng chất nào dư, dư bao nhiêu g b) Tính khối lượng CuCl2 thu được Ko chép trên mạng nha

2 câu trả lời

M k chắc đúng k nha

Đáp án:

a)7,6g

b)14,175g

 

Giải thích các bước giải:

a)CuO+2HClCuCl2+H2O

nCuO=1680=0,2mol

nHCl=7,66536,5=0,21mol0,21>0,212CuO dư

nCuOd=0,20,212=0,095mol

mCuOd=0,095×80=7,6g

b)nCuCl2=nHCl2=0,105mol

mCuCl2=0,105×135=14,175g

 

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