What is the cell reaction? — Electrochemistry Chemistry Question

💡 Solution & Explanation

The cell notation identifies the anode (oxidation) on the left and cathode (reduction) on the right. Anode reaction: $Fe(s) + 2OH^-(aq) \rightarrow FeO(s) + H_2O(l) + 2e^-$. Cathode reaction: $Ni_2O_3(s) + H_2O(l) + 2e^- \rightarrow 2NiO(s) + 2OH^-(aq)$. Summing these yields the overall cell reaction: $Ni_2O_3(s) + Fe(s) \rightarrow 2NiO(s) + FeO(s)$.