H2SO4+Al CuO+H2SO4 NaOH+H2SO4 NaOH+FeCl3 HCl+Zn CuO+HCl NaOH+HCl NaOH+CuSO4
3H2SO4+2Al=Al2(SO4)3+3H2... если H2SO4-концентрированная, то при t 6H2SO4+2Al=Al2(SO4)3+3SO2+6H2O CuO+H2SO4=CuSO4+H2O 2NaOH+H2SO4=Na2SO4+H2O 3NaOH+FeCl3=3NaCl+Fe(OH)3 2HCl+Zn=ZnCl2+H2 CuO+2HCl=CuCl2+H2O NaOH+HCl=NaCl+H2O 2NaOH+CuSO4=Na2SO4+Cu(OH)2