№1
а)
Fe+CuCl2 = Cu+FeCl2
3 Zn+2 FeBr3 = 3 ZnBr2+2 Fe
3 HgCl2+2 Al = 2 AlCl3+3 Hg
Mg+2 H2O = Mg(OH)2+H2
б)
Fe2O3+3 H2 = 2 Fe+3 H2O
3 PbO+2 Al = Al2O3+3 Pb
Cr2O3+3 Mg = 3 MgO+2 Cr
2 Al+6 H2O = 2 Al(OH)3+3 H2
№2
а)
2 KClO3 = 2 KCl+3 O2
2 NaNO3 = 2 NaNO2+O2
2 CuOH = Cu2O+H2O
2 Al(OH)3 = Al2O3+3 H2O
б)
3 KClO = KClO3+2 KCl
NH4NO3 = N2O+2 H2O
NH4NO2 = N2+2 H2O
(CuOH)2CO3 = 2 CuO+CO2+H2O
№3
а)
Mg+2 HCl = MgCl2+H2
4 HI+O2 = 2 I2+2 H2O
10 Al+3 V2O5 = 5 Al2O3+6 V
Br2+2 KI = 2 KBr+I2
б)
6 HCl+2 Al = 2 AlCl3+3 H2
2 Al+WO3 = W+Al2O3
I2+H2S = S+2 HI
2 F2+2 H2O = 4 HF+O2