   Chapter 2.5, Problem 2.4CYU

Chapter
Section
Textbook Problem

Give the number and identity of the constituent ions in each of the following ionic compounds; NaF, Cu(NO3)2 and NaCH3 CO2.

Interpretation Introduction

Interpretation:

For the given ionic compounds (NaF,Cu(NO3)2 and NaCH3CO2), the number and identity of constituted ions present are needed to be determined.

Concept introduction:

Ionic compounds are formed by electrostatic attraction between ions such as monoatomic ions and polyatomic ions; in which positively charged ions is known as cations and negatively charged ions are known as anions.

The sum of charges of ions present in an ionic compound is equals to net charge of the compound.

Explanation

In the given ionic compound NaF, there are Na ion and F ion present. Since the Na is group IA element, then the charge will be 1+ and thereby the charge F must be 1- to balance the two 1+ charge of Na ion.

The relative number of each ion is indicated in suffix of each ion.

That is,

One Na+ ion and one F ion are present in NaF compound.

In the given ionic compound Cu(NO3)2, there are Cu ion and NO3 ion present. Since the charge of NO3 is 1-, then the two NO3 ions will have 2- charge and thereby the charge of Cu must be 2+ to balance the charge of the two NO3 ions .

The relative number of each ion is indicated in suffix of each ion

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