Question

Calculate the equilibrium potential of a copper wire immersed in 0.0005 M CuSO4 solution. The standard electrode potential for the reaction Cu2+ + 2e- = Cu0 at 25°C is 0.34 V (NHE). Now, answer the following questions and enter your results (numerical number only). Calculate the ionic strength (M) of the solution.

Answer 1

Answer:

0.24V

Explanation:

First we must obtain the ionic strength of the solution I as shown in the image attached. This ionic strength can now be used to obtain the activity coefficient of the ions in solution by substitution of the value of the ionic strength obtained previously and the charge of the ion (Cu2+) into the equation for activity coefficient.

The activity of an ion is defined as the product of its activity coefficient and its concentration. This activity of copper II ion is now substituted into the Nernst equation to obtain the equilibrium potential required in the question.