At 298 K a galvanic cell couples the following half-reactions
CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry
Problem
At 298 K a galvanic cell couples the following half-reactions.
MnO₄⁻ + 8 H⁺ + 5 e⁻ → Mn²⁺ + 4 H₂O E° = +1.51 V
Sn⁴⁺ + 2 e⁻ → Sn²⁺ E° = +0.15 V
The MnO₄⁻/Mn²⁺ compartment contains [MnO₄⁻] = 0.010 M, [Mn²⁺] = 1.0 M, and [H⁺] = 1.0 M. In the Sn compartment the total concentration of tin species is fixed at [Sn²⁺] + [Sn⁴⁺] = 0.200 M. If the measured cell potential is 1.45 V, what is [Sn⁴⁺] in the Sn compartment?
(a) 2.9×10−2M
(b) 2.9×10−3M
(c) 2.9×10−4M
(d) 2.9×10−5M