1.
K(+)Cl(+5)O3(-2) -> K(+)Cl(+7)O4(-2) + K(+)Cl(-)
H(+)N(+3)O2(-2) -> H(+)N(+5)O3(-2) + N(+2)O(-2)+ H2(+)O(-2)
Na(+)Cl(+)O(-2) -> Na(+)Cl(+5)O3(-2) + Na(+)Cl(-)
2.
2NaOH + H2SO4 = Na2SO4 + 2H2O
KCl + AgNO3 = KNO3 + AgCl↓
Al(OH)3↓ + 3HNO3 = Al(NO)3 + 3H20
Fe2(SO4)3 + 2H3PO4 = 2FePO4↓ + 3H2SO4