A galvanic cell consists of a Cu²⁺|| Cuhalf-cell and a Fe³⁺ || Fe²⁺.If the Cu²⁺|| Cu half-cell standard cell functions as the anode,what is the standard reduction potential for the cell?

Question

Quizplus · Accepted Answer

The standard reduction potentials of Cu²⁺ and Fe²⁺ are given as +0.34V and -0.44V respectively. Since the Cu²⁺ half-cell is functioning as the anode, it means that it is being oxidized, therefore its reduction half-reaction needs to be flipped and the sign of its reduction potential needs to be changed. The overall cell potential can be calculated as: E°cell = E°reduction (cathode) - E°reduction (anode) E°cell = (-0.44V) - (-0.34V) E°cell = -0.1V Since the reduction potential of the cell is negative, it means that the spontaneous reaction is in the direction of the anode reaction, which is the oxidation of Cu²⁺. To obtain the reduction potential of the cell, the calculated value needs to be multiplied by -1. Therefore: E°cell (reduction potential) = -(-0.1V) = +0.1V The closest value to +0.1V is +0.43V, which is answer choice C.

A Galvanic Cell Consists of a Cu2+|| Cu half-Cell and a Fe3+

A Galvanic Cell Consists of a Cu²⁺|| Cuhalf-Cell and a Fe³⁺