How does cell EMF depend on increasing the concentration of KOH? — Electrochemistry Chemistry Question

💡 Solution & Explanation

In the overall balanced cell reaction ($Ni_2O_3(s) + Fe(s) \rightarrow 2NiO(s) + FeO(s)$), all reactants and products are in the solid state. Neither $OH^-$ ions nor water appear in the net reaction equation. Therefore, the reaction quotient $Q = 1$ regardless of the KOH concentration, making the cell EMF independent of it.