pH Changes in primary cells Primary Cells - pH changes during discharge


Alkaline Cell:

Manganese Dioxide Zinc Alkaline Cell

Anode (-) 
$\ce {Zn(s) + 2OH^{−}(aq) → ZnO(s) + H2O(l) + 2e^{−}}$

Cathode (+)
$\ce {2MnO2(s) + H2O(l) + 2e^{−} → Mn2O3(s) + 2OH^{−}(aq)}$

Overall
$\ce {Zn(s) + 2MnO2(s) → ZnO(s) + Mn2O3(s)}$


$\ce {OH-}$ ions are consumed at the anode
$\ce {OH-}$ ions are formed at the cathode
$\ce {same[OH^{−}]}$
pH - no change


Is this correct? Do pH changes occur during the discharge process?
No, the reaction does not produce hydroxide ions. But the solution is already basic (probably between pH 12 and 14).