6. Analytical Methods

Electrochemistry — Quiz

Test your understanding of electrochemistry with 5 practice questions.

Practice Questions

Question 1

Which of the following statements correctly describes the relationship between the standard cell potential ($\text{E}^\circ_{\text{cell}}$) and the equilibrium constant ($\text{K}$) for a redox reaction at standard conditions?

Question 2

In an electrochemical cell, what is the primary function of the salt bridge?

Question 3

A galvanic cell consists of a magnesium electrode in a $1.0\text{ M Mg}^{2+}$ solution and a silver electrode in a $1.0\text{ M Ag}^{+}$ solution. Given the standard reduction potentials: $$\text{Mg}^{2+}(\text{aq}) + 2\text{e}^- \to \text{Mg}(\text{s}) \quad \text{E}^\circ = -2.37\text{ V}$$ $\text{Ag}^{+}(\text{aq}) + \text{e}^- \to \text{Ag}(\text{s}) \quad \text{E}^\circ = +0.80\text{ V}$ Calculate the standard cell potential ($\text{E}^\circ_{\text{cell}}$) for this galvanic cell.

Question 4

Which of the following processes is an application of an electrolytic cell?

Question 5

Consider the Nernst equation: $\text{E}_{\text{cell}} = \text{E}^\circ_{\text{cell}} - \frac{\text{0.0592}}{\text{n}} \log \text{Q}$ If the concentration of a reactant in the anode compartment of a galvanic cell is decreased, how would this affect the cell potential ($\text{E}_{\text{cell}}$) at $25^\circ\text{C}$?