1)CaCO3+2H+ + 2Cl- = Ca2+ + 2Cl- + H20 + CO2
CaCO3+ 2HCl= CaCl2+H20+CO2
2) NH4+ + Cl- + H2O = NH4OH + H+ + Cl-
NH4Cl+H2O=NH4OH+HCl
3) Zn2+ + 2Cl- + 2Na+ + 2OH-= Zn(OH)2+ 2Na+ 2Cl-
ZnCl2+ 2NaOH= Zn(OH)2+ 2NaCl
4) PbS+ 2H+ + 2 Cl- = H2S + Pb2+ 2Cl-
PbS+2HCl= H2S+PbCl2
1)CaCO3+2H+ + 2Cl- = Ca2+ + 2Cl- + H20 + CO2
CaCO3+ 2HCl= CaCl2+H20+CO2
2) NH4+ + Cl- + H2O = NH4OH + H+ + Cl-
NH4Cl+H2O=NH4OH+HCl
3) Zn2+ + 2Cl- + 2Na+ + 2OH-= Zn(OH)2+ 2Na+ 2Cl-
ZnCl2+ 2NaOH= Zn(OH)2+ 2NaCl
4) PbS+ 2H+ + 2 Cl- = H2S + Pb2+ 2Cl-
PbS+2HCl= H2S+PbCl2