In basic solution

CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions

Problem

In basic solution, the incomplete reduction half-reaction

\text{MnO}_4^- \rightarrow \text{MnO}_2

is to be balanced. After oxygen atoms are balanced with

\text{H}_2\text{O}

and hydrogen atoms are balanced with

\text{OH}^-

, how many electrons must be added so that both mass and charge are conserved? (a)

5

(b)

3

(c)

4

(d)

2