A current of 10.0A is passed through 1.0L of 1.0M HCl solution for 965 seconds, pH of the solution at the end of the experiment is:-

Options

A. 0
B. 0.2
C. 0.8
D. none of the above

Answer

D

Explanation

1L of 1.0 M HCl solution contains 1 mole of HCl.
`H^(+)+e^(-)to(1)/(2)H_(2)`
1 faraday produces 0.5 mole of `H_(2)`
`(965xx10)/(96500)` faraday produces`=(0.5xx965xx10)/(96500)`
`=0.05` mole of `H_(2)`
`0.05` mole of `H_2` contains 0.1 mole H.
`therefore0.9` mole `H^+` left in solution.
`pH=-log[0.9]=0.125`.