a) 2K+2H2O--->2KOH+H2
K2O+H2O--->2KOH
b) 2Na+2H2O--->2NaOH+H2
Na2O+H2O--->2NaOH
c) Ca+2H2O--->Ca(OH)2+H2
CaO+H2O--->Ca(OH)2
f) CuCl+NaOH--->CuOH↓+NaCl
g) FeBr3+3KOH--->Fe(OH)3↓ +3KBr
h) Zn(NO3)2+2LiOH--->Zn(OH)2↓ +2LiNO3
