If hydrogen electrodes dipped in two solutions of `pH=3` and `pH=6` are connected by a salt bridge, the `EMF_(cell)` is

Options

A. 0.177 V
B. 0.3 V
C. 0.052 V
D. 0.104 V

Answer

A

Explanation

`E_("cell") = -0.59 log 10^(-6)/10^(-3) = -0.059 log 10^(-3)`
`= -0.059 xx (-3) = 0.177 V`