Question

Balance the following skeleton reactions and identify the oxidizing and reducing agents:
MnO4-(aq) + CN-(aq) --> MnO2(s) + CNO-(aq) [basic]

Answer 1

ANS)               BALANCING EQ IS

                    2 MnO4^-    + 3 CN^- + H2O         2 MnO2 + 3 CNO^- + 2 OH^-

                     Oxidizing agent is     : MnO4^-

                   Reducing agent is      :     CN^-

Oxidizing agent ; the substance which can show a decrease in oxidation no during a redox change.

Reducing agent ;   the substance which can show a increase in oxidation no during a redox change.

in the above      balancing eq 1)     select the oxidant& reductant atoms & write their oxidation& reduction half reactions.

2) balance the no of electrons & add the two equations

3) balancing of O" atoms is made by using H2O & OH- ions

4) add desired molucules of H2O on the side rich with O" atoms & OH^- double ON Opposite side

5) finally we get balanced eq.

                    thank u