Skip to content
New summer mock series is live Attempt timed papers for SSC, banking, and engineering entrances with updated syllabi for this season. View exams

Question

A cell Co(s) | Co²⁺(0.01 M) || Br₂(l) | Br⁻(0.05 M) | Pt(s) operates at 298 K. What is the cell potential? (Given: E°Co²⁺/Co = -0.28 V , E°Br_₂/Br⁻ = 1.07 V )

Options

Choose one · Correct answer highlighted

Explanation

E°cell = 1.07 - (-0.28) = 1.35 V . Ecell = 1.35 - (0.059/2) log ([Co²⁺][Br⁻]²/1) = 1.35 - 0.0295 log (0.01 × 0.0025) = 1.35 + 0.073 = 1.423 V .