$\underset{Dipot.\,\,succinate}{\mathop{\begin{matrix}
   C{{H}_{2}}COOK  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}COOK  \\
\end{matrix}}}\,$ $\xrightarrow{ionization}$ $\begin{matrix}
   C{{H}_{2}}CO{{O}^{-}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}CO{{O}^{-}}  \\
\end{matrix}$ $+2K^+$

$2{{H}_{2}}O\,\overset{ionization}{\longleftrightarrow}2O{{H}^{-\,}}+\,2{{H}^{+}}$

At anode :

$\begin{matrix}
   C{{H}_{2}}CO{{O}^{-}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}CO{{O}^{-}}  \\
\end{matrix}$ $\xrightarrow{2{{e}^{-}}}$  $\underset{Unstable}{\mathop{\left[ \begin{matrix}
   C{{H}_{2}}COO  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}COO  \\
\end{matrix} \right]}}\,$ $\to $ $\begin{matrix}
   C{{H}_{2}}  \\
   ||\,\,\,\,\,\,  \\
   C{{H}_{2}}  \\
\end{matrix}$ $+\,2CO_2$

At cathode :

$2H^+ + 2e^-\to [2H]\to H_2$