Write the name of the cell which is generally used in hearing aids. write the reactions taking place at the anode and the cathode of this cell.
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40
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
H2O (S) + H2O(l) + 2e-1 → Hg(l) + 2OH- (aq)
Zn (s) + 2OH-1 (aq) → Zn(OH)2 (s) + 2e-
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The half-reactions are
H2O (S) + H2O(l) + 2e-1 → Hg(l) + 2OH- (aq)
Zn (s) + 2OH-1 (aq) → Zn(OH)2 (s) + 2e-
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Answered by
43
Hey !!
Mercury Cell.
Anode : Zn (Hg) + 2OH⁻ -----> ZnO(s) + H₂O + 2e⁻
Cathode : HgO + H₂O + 2e⁻ -----> Hg(l) + 2OH⁻
Good luck !!
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