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Chemistry In Focus

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

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Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 14, Problem 42E
Textbook Problem
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An engineer suggests using a plastic can instead of a zinc can as a way to reduce the cost of producing a common flashlight battery (Leclanché dry cell). What is wrong with this idea?

Interpretation Introduction

Interpretation:

The reason behind the idea “plastic can be used in the place of zinc to reduce the cost of flashlight batteries,” being wrong is to be explained.

Concept introduction:

A zinc–carbon dry cell or battery, used in our daily life, is packaged in a zinc can that serves as a container as well as a negative terminal (anode). The positive terminal of dry cell is a carbon rod, which is surrounded by a mixture of manganese dioxide and carbon powder.

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

A Leclanche dry cell or flashlight battery is called ‘dry’ because there is no liquid present.

Explanation of Solution

The Leclanche dry cell or flashlight battery is a single electrochemical cell. It is made up of a zinc anode and a carbon rod cathode. MnO2 is present in the Leclanche dry cell. MnO2 is being reduced. Zinc and magnesium oxide are kept in different compartments

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Chapter 14 Solutions

Chemistry In Focus
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Ch. 14 - Can an oxidation reaction occur without a...Ch. 14 - Why is carbon oxidized in the following reaction...Ch. 14 - Why is bromine reduced in the following reaction...Ch. 14 - What is an oxidizing agent? A reducing agent?Ch. 14 - Name some common oxidizing and reducing agents,...Ch. 14 - Write equations for respiration and...Ch. 14 - Explain how an electrochemical cell works. Include...Ch. 14 - Use chemical equations to explain how an...Ch. 14 - Use chemical equations to describe a Leclanch dry...Ch. 14 - What is a fuel cell? How is it different from a...Ch. 14 - Give a thermodynamic argument for why it is more...Ch. 14 - Use chemical equations to explain how the...Ch. 14 - Use chemical equations to explain how the molten...Ch. 14 - Explain with the help of chemical equations why...Ch. 14 - Explain how each of the following helps prevent...Ch. 14 - How might aging and oxidation be related?Ch. 14 - What are free radicals, and how might they affect...Ch. 14 - What are the chemical similarities among the...Ch. 14 - What are the chemical similarities among the...Ch. 14 - Draw Lewis structures for each chemical reaction,...Ch. 14 - Draw Lewis structures for each chemical reaction,...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, identify the oxidizing agent...Ch. 14 - For each reaction, identify the oxidizing agent...Ch. 14 - Identify the oxidizing agent and the reducing...Ch. 14 - Identify the oxidizing agent and the reducing...Ch. 14 - Which would you expect to be a better oxidizing...Ch. 14 - Which would you expect to be a better reducing...Ch. 14 - Sum each of the following oxidation and reduction...Ch. 14 - Sum each of the following oxidation and reduction...Ch. 14 - A chemist attempts to protect two pieces of iron...Ch. 14 - A friend tells you that a health-related website...Ch. 14 - Which of the following factors might affect the...Ch. 14 - An engineer suggests using a plastic can instead...Ch. 14 - A molten carbonate fuel cell (MCFC) costs...Ch. 14 - Fossil fuel, nuclear, and hydroelectric power...Ch. 14 - The following diagram shows an electrochemical...Ch. 14 - The following diagram shows a molecular view of...

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