Напишите уравнения реакций…

1) 2Na+2H2O=2NaOH+H2 H2S+2NaOH=Na2S+2 H2O Na2S+HCl=H2S (газ)+NaCl 2NaCl+H2SO4=Na2SO4+2HCl (газ) 2) Mg+H2SO4=MgSO4+H2 MgSO4+2NaOH=Mg (OH) 2+Na2SO4 Mg (OH) 2=(t) MgO+H2O MgO+2HCl=MgCl2+H2O 3) 2Pb+O2=2PbO PbO+2HNO3=Pb (NO3) 2+H2O Pb (NO3) 2+2NaOH=2NaNO3+Pb (OH) 2 Pb (OH) 2=(t) PbO+H2O PbO+H2SO4=PbSO4+H2O 4) S+H2=H2S H2S+2KOH=K2S+2 H2O K2S+2HCl=2KCl+H2S (газ) 2KCl+H2SO4=K2SO4+2HCl (газ)