2HCl+CaCO3=CaCl2+CO2+H2O
1) 2Na+H2=2NaH
NaH+H2O=NaOH+H2
NaOH+H2SO4(изб. Конц) =NaHSO4+H2O
NaHSO4+NaOH=Na2SO4+H2O
Na2SO4+BaCl2=BaSO4+2NaCl
NaCl+AgNO3=NaNO3+AgCl
2HCl+CaCO3=CaCl2+CO2+H2O
1) 2Na+H2=2NaH
NaH+H2O=NaOH+H2
NaOH+H2SO4(изб. Конц) =NaHSO4+H2O
NaHSO4+NaOH=Na2SO4+H2O
Na2SO4+BaCl2=BaSO4+2NaCl
NaCl+AgNO3=NaNO3+AgCl