Question

Find the electrode potential at 25 ° c for an electrode in contact with a solution whose ph is 10. (a)0.59volt (b)-0.59volt.............which option is correct and why?​

Answer 1

Answer:

p H = 10

Using formula [H+] = 10-pH

So [H+] = 10-10 M

Electrode reaction will be

H+ + e- → ½ H2

Use the formula

Value of E0 = 0

Ecell = E0 - 0.0591 log[H2]

1 [H+]

Ecell = - 0.0591 log( 1/10-10)

1

Ecell = - 0.0591 ( 10) = -0.591 V

1