Question
Determine the electrode potential of Sn ^ 2+ (0.01 M )\ |\ Sn(s) at 25^ C if E^ _ Sn is -0.136 V.
MHT CET
Chemistry
Electrochemistry
2026
MHT CET 2026 (20 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 0.186 V
- B. -0.186 V
- C. -0.195 V
- D. 0.195 V
Answer
C. -0.195 V
Step-by-step solution
The reduction half-reaction is Sn ^ 2+ + 2e^ - Sn(s) . Using the Nernst equation: E = E^ - 0.0591 n 1 [ Sn ^ 2+ ] Substituting the given values (n = 2, [ Sn ^ 2+ ] = 0.01 M , E^ = -0.136 V ): E = -0.136 - 0.0591 2 1 0.01 E = -0.136 - 0.02955 (100) E = -0.136 - 0.02955 2 E = -0.136 - 0.0591 E = -0.1951 V -0.195 V Answer: -0.195 V
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