Ca → Ca(OH)2 → CaCO3
1.Ca + 2H2O = Ca(OH)2↓ + H2
2.Ca(OH)2 + CO = CaCO3 + H2
Na → NaOH → NaCl
1.2Na + 2H2O = 2NaOH + H2↑
2.FeCl3 + 3NaOH → Fe(OH)3↓ + 3NaCl
AlBr3 → Al(OH)3 → AlCl3
1.AlBr3 + 3KOH = Al(OH)3↓ + 3KBr
2.Al(OH)3 + 3 HCl(разб.) = AlCl3 + 3H2O