Find the time required to liberate 1.0 liter of hydrogen at STP in an electrolytic cell by a current of 5.0 A.
Given
Mass of 1 liter hydrogen,
m=222.4 g
Current = 5A
Let t be required time
Using the formula, from faraday’s law of electrolysis –
where,
m = the mass of the substance deposited on the electrode
z=electrochemical equivalence
i=current passing
t=time taken
substituting the values,