1)2 Na + 2H2O =2 NaOH + H2
Ba + 2H2O = Ba(OH)2 + H2
2) Ca + 2HCl = CaCl2 + H2
Zn + 2HCl = ZnCl2 + H2
Mg +2HCl = MgCl2 + H2
3) FeSO4 + Zn = ZnSO4 + Fe
FeSO4 + Mn = MnSO4 + Fe
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1)2 Na + 2H2O =2 NaOH + H2
Ba + 2H2O = Ba(OH)2 + H2
2) Ca + 2HCl = CaCl2 + H2
Zn + 2HCl = ZnCl2 + H2
Mg +2HCl = MgCl2 + H2
3) FeSO4 + Zn = ZnSO4 + Fe
FeSO4 + Mn = MnSO4 + Fe