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Consider the single electrode process 4H...

Consider the single electrode process `4H^ + 4e^- = 2H_2` catalyzed by platinum black electrode in HCl electrolyte. The potential of the electrode is -0.059V Vs. SHE. What is the concenteration of the acid in the hydrogen half cell if the `H_2` pressure is 1 bar?

A

1M

B

10M

C

0.1M

D

0.01M

Text Solution

Verified by Experts

The correct Answer is:
C
answer(3) `E = 0.059 log[H^+]`
`Rightarrow -0.059 = 0.059 log[H^+]` .
`log[H^+] = -1` .
`rightarrow H^+ = 10^-1` .
`therefore H^+ = 0.1M`.
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Knowledge Check

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