Part B

Let us consider balancing the redox reaction that occurs between nickel(IV) oxide and manganese(IV) oxide to form nickel(II) hydroxide and manganate(V) at a high pH. The unbalanced form of the reaction is shown below.

?NiO2(s) + ?MnO2(s) →?Ni(OH)2(s) + ?MnO43−(aq)

The final balanced equation will also include water molecules and hydroxide ions, but let us first balance the half reaction for the reduction. Write a balanced half reaction, including any necessary water molecules, hydroxide ions, and electrons, for the reduction of NiO2(s) to Ni(OH)2(s).

Express the reduction as a chemical equation including phases and electrons.