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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. How does an electrolysis cell differ from a galvanic cell?

Interpretation Introduction

Interpretation:

The difference between electrolytic cell and galvanic cell should be explained.

Concept Introduction:

The oxidation and reduction can be identified by change in oxidation state. If oxidation state of atom of an element increases, it undergoes oxidation and if it decreases, it undergoes reduction.

The general oxidation and reduction half reactions are as follows:

AsA+aq+e

Here, As undergoes oxidation to form A+aq with release of 1 electron. The oxidation state of A increases from 0 to 1.

Similarly,

B+aq+eBs

Here, B+aq undergoes reduction to form Bs with addition of 1 electron. The oxidation state of A decreases from 1 to 0.

Explanation

In the galvanic cell chemical energy gets converted into electrical energy.

The spontaneous redox reaction in the galvanic cell is reason for the electrical energy production.

In the galvanic cell, two half-reactions take place in two different containers joined together by salt bridge. The negative end is known as anode and positive end is cathode. The oxidation reaction takes place at anode and reduction reaction takes place at cathode. To get oxidized, the species supply electrons and movement of electrons take place from anode to cathode in the external circuit of the cell...

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