Write the name of the cell which is generally used in hearing aids. Write the reactions taking place at the anode and cathode of this cell.
Write the name of the cell which is generally used in hearing aids. Write the reactions taking place at the anode and cathode of this cell.
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A mercury battery, used for hearing aids and electric watches, delivers a constant voltage of 1.35 V for long periods.
The half-reactions are
Anode:
Zn (Hg) + 2 OH ̶ → ZnO (s) + H2O + 2e ̶
Cathode:
HgO + H2O + 2e ̶ → Hg (l) + 2 OH ̶
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