Calculate the volume in cm3 of oxygen evolved a... - JAMB Chemistry 2013 Question
Calculate the volume in cm3 of oxygen evolved as s.t.p. when a current of 5 A is passed through acidified water for 193s
{F = 96500 Cmol-1, Molar volume of a gas at s.t.p. = 22.4 dm3}
{F = 96500 Cmol-1, Molar volume of a gas at s.t.p. = 22.4 dm3}
A
224.000 dm3
B
0.056 dm3
C
0.224 dm3
D
56.000 dm3
correct option: b
Q = 1 x t (\implies) Q = (5 x 193)C
Q = 965C
40H (\implies) 2H2O + O2 + 4e
4 X 96500C evolve 22.4 dm3 x 965
4 x 96500 = 0.056 dm3
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