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Question

A 4.0 molar aqueous solution of NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrode.


[Atomic mass: Na = 23, Hg = 200; 1 Faraday = 96500 coulombs]

The total charge (coulombs) required for complete electrolysis is:

A
24125
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B
48250
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C
96500
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D
193000
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Solution

The correct option is D 193000
Faraday's Laws of Electrolysis Calculations of Current in Coulomb: Q=n(e)×F

In the cell 2 moles of electrons (2 Faraday) are required.

Q=2×96500C=193000C

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