Chapter 18, Problem 8STP

Interpretation Introduction

Interpretation: The given parts of the cell need to be labeled.

Anode, cathode, reducing agent and oxidizing agent.

Concept introduction: Electrochemistry is the study of interchange of electrical and chemical energy. It involves two types of processes; production of electric current from a chemical reaction and for this chemical change, electric current is used.

Answer to Problem 8STP

The given parts; anode, cathode, reducing agent and oxidizing agent are labeled as follows:

Explanation of Solution

In electrochemistry, electrode at which oxidation occurs is anode and at which reduction occur is the cathode. Oxidizing agent gains one or more electrons from another reactant. Due to this reason, oxidizing agent is reduced. Reducing agent donates electrons to another reactant.

Conclusion

Loss of electron/s by a substance is oxidation and gain of electron/s is reduction. For the production of electric current, a battery uses the energy from an oxidation-reduction reaction.