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CGP EDU Academic Team
Published on: August 14, 2026
I 2 (s)/I - (0.1M) half cell is connected to a H + (aq)/H 2 (1 bar)/Pt half cell and e.m.f. is found to be 0.7714 V If 
= 0.535V , find the pH of H + /H 2 half cell.
Text Solution
Verified by ExpertsThe correct answer is:
3
3
The cell reaction is
Here n = 2 (n = number of electons involved )
On solving (H+) = 10 -3
pH = -log(H + ) = -log(10 -3 )
So pH = 3
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