Calculate E_cell for the following electrochemical cell at 25 °C Pt(s) | H₂(g,1.00 atm) | H⁺(aq,1.00 M) || Sn²⁺(aq,0.350 M) ,Sn⁴⁺(aq,0.020 M) | Pt(s)
The standard reduction potentials are as follows:
Sn⁴⁺(aq) + 2 e^- → Sn²⁺(s)
E° = +0.15 V
2 H⁺(aq) + 2 e^- → H₂(g)
E° = 0.00 V

Question

Quizplus · Accepted Answer

The cell potential E_cell is calculated using the Nernst equation: E_cell = E°_cell - (RT/nF)lnQ. The standard cell potential E°_cell is 0.15 V (Sn⁴⁺/Sn²⁺) - 0.00 V (H⁺/H₂) = 0.15 V. The reaction quotient Q = [Sn²⁺]/[Sn⁴⁺] = 0.350/0.020 = 17.5. Using the Nernst equation at 25°C (298 K), E_cell = 0.15 V - (0.0592/2)log(17.5) ≈ 0.11 V.

Calculate Ecell for the Following Electrochemical Cell at 25 °C

Calculate E_cell for the Following Electrochemical Cell at 25 °C