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explain the reactions taking place in dry cell and mercury cells?

explain the reactions taking place in dry cell and mercury cells?

Grade:

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
6 years ago
Mercury cells
Mercury batteries are small, circular metal batteries that were used in watches. Mercury cells offer a long lifetime in a small size but the mercury produced as the cell discharges is very toxic. Mercury cells only produce 1.3 volts.
HgO +Zn +H2O ------>Hg +Zn(OH)2 +lectrical energy

dry cell
A dry-cell battery uses an immobilized electrolyte that minimizes moisture and allows for superior portability.
A common dry cell battery is zinc-carbon battery
Zn +2MnO2 +2NH4(aq)------>Mn2O3(s) +H2O(l) +Zn2 +2NH3(g)
E0=1.5V

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