Question

Calculate the standard cell potential of the following cell at 25°C: Cd(s) | Cd2+(aq) || Cu2+(aq) | Cu(s)​

Answer 1

Calculate the standard emf of the cell: Cd | Cd2+|| Cu2+ | Cu and determine the cell reaction. The standard reduction potentials of Cu2+ | Cu and Cd2+ | Cd are 0.34V and – 0.40 volts respectively. Predict the feasibility of the cell reaction.Read more on Sarthaks.com - https://www.sarthaks.com/892642/calculate-the-standard-emf-of-the-cell-cd-cd-2-cu-2-cu-and-determine-the-cell-reaction

Answer 2

Explanation:

The given cell notation is:

Cd(s) | Cd2+(aq) || Cu2+(aq) | Cu(s)

Recall that the anode/oxidation half-cell is written on the left while the cathode/reduction half-cell is written on the right. This means:

Cathode: Cu2+(aq) + 2 e– → Cu(s), E˚ = 0.34 V

Anode: Cd(s) → Cd2+(aq) + 2 e–, E˚ = – 0.40 V

The standard cell potential is:

E˚cell = E˚cathode – E˚anode

E˚cell = 0.34 V – (– 0.40 V) = 0.74 V