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Practice question

MCQ

Question

A cell Ni(s) | Ni²⁺(0.001 M) || Cl₂(g)(2 atm) | Cl⁻(0.1 M) | Pt(s) operates at 298 K. What is the cell potential? (Given: E°Ni²⁺/Ni = -0.25 V , E°Cl_₂/Cl⁻ = 1.36 V )

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Explanation

E°cell = 1.36 - (-0.25) = 1.61 V . Ecell = 1.61 - (0.059/2) log ([Ni²⁺][Cl⁻]²/PCl_₂) = 1.61 - 0.0295 log (0.001 × 0.01/2) = 1.61 + 0.103 = 1.713 V .

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