а) 2Na + 2HCl = 2NaCl + H2
2NaCl -> 2Na + Cl2 электролиз
NaCl + AgNO3 = AgCl + NaNO3
2AgCl + Zn = ZnCl2 + 2Ag
2NaCl + H2SO4 = Na2SO4 + 2HCl
HCl + AgNO3 = AgCl + HNO3
б) 2Li + 2HNO3 = 2LiNO3 + H2
4Li + O2 = 2Li2O
Li2O + H2O = 2LiOH
2LiOH + ZnCl2 = Zn(OH)2 + 2LiCl
Zn(OH)2 -> ZnO + H2O
Li2O + HCl = 2LiCl + H2O
ZnO + 2HCl = ZnCl2 + H2O
Zn(OH)2 + 2NaOH = Na2ZnO2 + 2H2O