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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 15, Problem 7E
Textbook Problem
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What are the problems associated with using soap in hard water?

Interpretation Introduction

Interpretation:

The problem associated with using soap in hard water is to be stated.

Concept Introduction:

Hard water contains high minerals. When water is filtered by the way of settling down from limestone and chalk that are mainly made up of carbonates of magnesium and calcium, in that case water becomes hard in nature.

Explanation of Solution

Hard water mainly contains magnesium and calcium ions that decrease the efficiency of soap. Thus, in hard water, soap is not able to remove oil efficiently.

When using the hard water, calcium and magnesium ions react with molecules of soap and form a grey film on skin during bathing or on the sides of the bathtub, generating the rings on the sides of the bathtub.

The reaction is as follows:

2CH3(CH2)16COO-soap+Ca

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Chemistry In Focus
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