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Why is MgCl 2 named magnesium chloride and not magnesium dichloride? Because MgCl 2 is a molecular compound, and molecular compounds do not use prefixes in their names. Because MgCl 2 is an ionic compound, and ionic compounds do not use prefixes in their names. Because MgCl 2 contains two metals and, therefore, follows different nomenclature rules.

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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 4, Problem 3SC
Textbook Problem
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Why is MgCl 2 named magnesium chloride and not magnesium dichloride?

Because MgCl 2 is a molecular compound, and molecular compounds do not use prefixes in their names.

Because MgCl 2 is an ionic compound, and ionic compounds do not use prefixes in their names.

Because MgCl 2 contains two metals and, therefore, follows different nomenclature rules.

Interpretation Introduction

Interpretation:

The reason for the statement “MgCl2 is named magnesium chloride and not as magnesium dichloride” is to be explained.

Concept Introduction:

Ionic compounds are named by writing the name of cation (metal), followed by anion (non-metal) with a suffix “ide”.

While naming the ionic compounds prefixes such as di or tri are not used to indicate any number of atoms.

Explanation of Solution

Reason for correct option:

The compound MgCl2 is an ionic compound and ionic compounds do not have prefixes such as di or tri in their names.

Hence, option (b) is correct.

Reasons for incorrect options:

Option (a) is incorrect b

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Chapter 4 Solutions

Chemistry In Focus
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