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For the electrochemical cell shown below...

For the electrochemical cell shown below `Pt|H_2(p=1atm)|H^+(aq.,xM)||Cu^(2+)(aq.,1.0M)|Cu(s)` The potentialis 0.49 V at 298 K. The pH of the solution is closest to:[Given, standard reduction potential, `E^@` for `Cu^(2+)//Cu` is 0.34 V. Gas constant, R is `8.31 JK^-1mol^-1` Faraday constant, F is `9.65xx10^4JV^-1mol^-1`]

A

1.2

B

8.3

C

2.5

D

8.2

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