Question

Find the value of 'b' for the following half equation.
$Mn ^{2+}+x H _{2} O \longrightarrow MnO _{2}+ aH ^{+}+ be ^{-}$

Answer 1

Balanced half equation is
$Mn ^{2+}+2 H _{2} O \longrightarrow MnO _{2}+4 H ^{+}+2 e ^{-}$
Value of ' $b$ ' is $2$ .