Са(OH)2+KCl=CaCl+KOH
Ba(NO3)2+K2SO4=Ba(SO4)2+KNO3
2. 2Al+3Cl2=2AlCl3
2Al (0) + 3Cl (0)= 2Al(3+) + 6Cl(1-)
AlCl3+3KOH=3KCl+Al(OH)3↓
Al(3+) +3Cl(1-) + 3K(1+) + 3OH(1-)=3Cl(1-) + 3K(1+) + Al(OH)3↓
Al(3+) + 3OH(1-)=Al(OH)3↓
2Al(OH)3=Al2O3+3H2O
5. 2KOH+CuSO4=Cu(OH)2↓+K2SO4
Fe2(SO4)3 + 6NaOH = 2Fe(OH)3 + 3Na2SO4
CH4 + O2 (k) -> H-COH +H2O
1)H-COH + H2-> CH3-OH
2)CH3-OH + HCl->CH3-Cl + H2O
3)2CH3Cl + 2Na -> C2H6 + 2NaCl
4)C2H6 + Cl2->C2H5Cl + HCl
C2H5Cl + KOH -> C2H5OH + KCl
5)C2H5OH CuO-> CH3-COH + Cu + H2O
6)CH3-COH + [O] -> CH3-COOH
CH3-COOH + KOH -> CH3-COOK + H2O
CH3-COOK + KOH (t) -> CH4 + K2CO3