a) Ca+2 H2O--->Ca(OH)2+H2
b) Zn+2 HCl--->ZnCl2+H2
Zn+H2SO4--->ZnSO4+H2
c) Cu+2 NaOH+2 H2O--->Na2[Cu(OH)4]+H2
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a) Ca+2 H2O--->Ca(OH)2+H2
b) Zn+2 HCl--->ZnCl2+H2
Zn+H2SO4--->ZnSO4+H2
c) Cu+2 NaOH+2 H2O--->Na2[Cu(OH)4]+H2