Question

What is the reduction half-reaction for the following overall cell reaction?

Answer 1

Reduction half reaction:
`Ni^(2+)` + `2e^-` `->` `Ni`
Reduction is a gain of electrons. In the reaction stated above there is an increase in number of electrons from `+2` `->` `0` by gaining two electrons . Note that increase in number of electrons= decrease in oxidation number.