ZnCl2 + 2NaOH = Zn (OH)₂ + 2NaCl
Zn2+ + 2CL- + 2Na+ + 2OH- = Zn (OH)₂ + 2Na+ + 2CL-
3MgCl2 +2H3PO₄=Mg₃(PO₄)₂ +6 HCl
3Mg 2+ + 6CL- + 6H+ + 2PO₄3- = Mg₃(PO₄)₂ + 6H+
+ 6CL-
H2SO4 + Na2SO3 = Na2SO4 + SO2 +
H2O
2H⁺+ SO42- +2Na + + SO²⁻₃= 2Na + + SO42-+ SO2 + H2O