The chemical reaction [tex]CuSO_{4} + BaCl_{2} yields BaSO_{4} + Cu Cl_{2}[/tex] is not an oxidation-reduction reaction because there is no trasfer of electrons. The following are the oxidation numbers of the species involved: Reactants side: Cu = +2 Sulfate ion = -2 Cl2 = -2 Ba = +2
Products side: Cu = +2 Sulpahte Ion = -2 Cl2 = -2 Ba = +2
