JAMB - Chemistry (1999 - No. 23)
What quantity of electricity will liberate 0.125 mole of oxygen molecules during the electrolysis of dilute sodium chloride solution?
[ F = 96 5000 C mol-1 ]
[ F = 96 5000 C mol-1 ]
24 125 coulombs
48 250 coulombs
72 375 coulombs
96 500 coulombs
Explanation
4 Faradays of electricity is required to liberate one mole of oxygen gas
∴ quantity of electricity required
= 0.125 * 4 * 96500 = 48250 coulombs
∴ quantity of electricity required
= 0.125 * 4 * 96500 = 48250 coulombs
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