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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 14, Problem 41E
Textbook Problem
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Which of the following factors might affect the lifetime of an automobile battery?

a. concentration of the sulfuric acid solution

b. size of the porous lead plates

c. size of the battery casing

Interpretation Introduction

Interpretation:

The factors that affect the lifetime of an automobile are to be explained.

Concept Introduction:

The chemical reaction in which oxidation process and reduction process take place simultaneously, is called a redox reaction.

Electrolysis is the process in which a reaction takes place at electrodes. During electrolysis, reduction takes place at the cathode and oxidation takes place at the anode.

The automobile battery is a type of battery that converts chemical energy into electrical energy.

The automobile battery is a lead-acid storage battery.

Explanation of Solution

a) Concentration of the sulfuric acid solution

The concentration of sulphuric acid affects the longevity of an automobile battery because an automobile battery is formed when lead oxide and sponge lead are immersed in dilute sulphuric acid. The sulphuric acid completely dissociates into (2H+) and (SO42) in the aqueous solution. The positively charged hydrogen moves towards the electrode connected to the negative terminal. The negatively charged sulfate ion moves towards the electrode connected to the positive terminal. The hydrogen ion captures an electron from the anode and sulfate gives two electrons to the cathode. The higher the concentration of the sulfate ion and hydrogen ion in the battery, the greater is the concentration of sulfate ions available for the redox reaction to take place.

b) Size of the porous lead plates

The size of porous lead plates affects the longevity of the automobile battery. The negative plate in the automobile battery is made of lead. The hydrogen ion captures an electron from lead oxide and the sulfate ions donate electrons to lead. The oxidation of lead occurs at the anode. Lead is oxidized in the presence of sulfate ion to form Pb2+ ion

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Chapter 14 Solutions

Chemistry In Focus
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