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Electrochemistry
Question
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What are fuel cells? Write the reaction of a oxygen hydrogen fuel cell.

Answer

Fuel cell: A galvanic cell in which the reactants are continuously fed into the cell and the products are continuously removed is called a fuel cell.
The most important fuel cell is hydrogen oxygen fuel cell.

The reactions taking place in this fuel cell are

Cathode: O2(g) + 2H2O(l) + 4e–--->4OH–(aq)
Anode: 2H2 (g) + 4OH–(aq)---> 4H2O(l) + 4e–
Overall reaction being:

2H2(g) + O2(g) ---> 2H2O(l )

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