Chapter 18.3, Problem 1RQ

Interpretation Introduction

Interpretation: Difference between a galvanic cell and an electrolytic cell needs to be explained.

Concept Introduction: Electrochemistry is the study of interchange of an electrical and chemical energy. In this process, electric current is produced from an oxidation-reduction reaction. and chemical changes are produced by electric current.

Answer to Problem 1RQ

Difference between a galvanic cell and an electrolytic cell is as follows:

Galvanic cell	Electrolytic cell
It transfers chemical energy into electrical energy.	It transfers electrical energy into chemical energy.
Anode is a negative electrode	Anode is a positive electrode
Cathode is a positive electrode	Cathode is a negative electrode

Explanation of Solution

In a galvanic cell, chemical energy is changed to electrical energy while in electrolytic cell electrical energy changes to chemical energy.

In a galvanic cell, oxidation results at the anode and reduction takes place at the cathode. In an electrolytic cell, oxidation occurs at cathode and reduction occurs at the anode.

Conclusion

Electrolysis is a process in which a current is forced via a cell to produce a chemical reaction.