Cân bằng Fe + H2SO4(đặc nóng) ---------> Fe2(SO4)3 + SO2 + H2O Fe3O4 + HNO3(loãng) ---------> Fe(NO3)3 + NO + H2O Zn + H2SO4(đặc,,nóng) --------> ZnSO4 + H2S + H2O KMnO4 + HCl ------> KCl + MnCl2 + Cl2 + H2O Al + NaOH + H2O -------> NaAlO2 + H2 Cu(NO3)2 --------> CuO + NO2 + O2 NaOH + Cl2 -------> NaCl + NaClO + H2O

2 câu trả lời

Đáp án+Giải thích các bước giải:

2Fe + 6H2SO4(đặc nóng) → Fe2(SO4)3 + 3SO2 + 6H2O

3Fe3O4 + 28HNO3(loãng) → 9Fe(NO3)3 + NO + 14H2O

4Zn + 5H2SO4(đặc,nóng) → 4ZnSO4 + H2S + 4H2O

2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 5Cl2 + 8H2O

2Al + 2NaOH + 2H2O → 2NaAlO2 + 3H2 

2Cu(NO3)2 → 2CuO + 4NO2 + O2

2NaOH + Cl2 → NaCl + NaClO + H2O

2Fe + 6H2SO4(đ,n) → Fe2(SO4)3 + 3SO2 + 6H2O

3Fe3O4 + 28HNO3(l) → 9Fe(NO3)3 + NO + 14H2O

4Zn + 5H2SO4(đ,n) → 4ZnSO4 + H2S + 4H2O

2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 5Cl2 + 8H2O

2Al + 2NaOH + 2H2O → 2NaAlO2 + 3H2 

2Cu(NO3)2 → 2CuO + 4NO2 + O2

2NaOH + Cl2 → NaCl + NaClO + H2O

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