Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN: 9781337399074
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter 2, Problem 43PS

Give the formula and the number of each ion that makes up each of the following compounds:

(a) K2S

(b) CoSO4

(c) KMnO4

(d) (NH4)3PO4

(e) Ca(CIO)2

(f)NaCH3CO2

(a)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

For the given ionic compounds, the number and formula 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.

Answer to Problem 43PS

K2S is composed of one K+ ion and two S2 ions.

Explanation of Solution

In the given ionic compound K2S, there are K ion and S ion present. Since the potassium is group IA element, then the charge will be 1+ and thereby the charge of S must be 2- to balance the 2+ charge of two  K ions.

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

That is,

One K+ ion and two S2 ions are present in K2S compound.

(b)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

For the given ionic compounds, the number and formula 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.

Answer to Problem 43PS

CoSO4 is composed of one Co2+ ions and one SO42 ion.

Explanation of Solution

In the given ionic compound CoSO4, there are Co ion and SO4 ion present. Since the charge of SO4 is 2-, then the charge of Co must be 2+ to balance the charge of the SO4 ions .

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

That is,

One Co2+ ion and one SO42 ion are present in CoSO4 compound.

(c)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

For the given ionic compounds, the number and formula 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.

Answer to Problem 43PS

KMnO4 is composed of one K+ ion and one MnO4 ion.

Explanation of Solution

In the given ionic compound KMnO4, there are K ion and MnO4 ion present. Since the potassium is group IA element, then the charge will be 1+ and also the charge of MnO4 is 1-.

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

That is,

One K+ ion and one MnO4 ion are present in KMnO4 compound.

(d)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

For the given ionic compounds, the number and formula 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.

Answer to Problem 43PS

(NH4)3PO4 is composed of three NH4+ ion and one PO4 ion.

Explanation of Solution

In the given ionic compound (NH4)3PO4, there are NH4 ion and PO4 ion present. The charge of NH4 is 1+ and also the charge of PO4 is 3-.

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

That is,

One NH4+ ion and one PO43 ion are present in (NH4)3PO4 compound.

(e)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

For the given ionic compounds, the number and formula 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.

Answer to Problem 43PS

Ca(ClO)2 is composed of one Ca2+ ion and two ClO ions.

Explanation of Solution

In the given ionic compound Ca(ClO)2, there are Ca ion and ClO ion present. Since the Ca is group IIA element, then the charge will be 2+ and the charge of ClO is 1-. So there will be two ClO ions for each of the Ca2+ ion.

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

That is,

One Ca2+ ion and one ClO ion are present in Ca(ClO)2 compound.

(f)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

For the given ionic compounds, the number and formula 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.

Answer to Problem 43PS

NaCH3CO2 is composed of one Na+ ion and one CH3CO2 ion .

Explanation of Solution

In the given ionic compound NaCH3CO2, there are Na ion and CH3CO2 ion present. Since the Na is group IA element, then the charge will be 1+ and thereby the charge CH3CO2 must be 1- to balance the two 1+ charge of sodium ion.

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

That is,

One Na+ ion and one CH3CO2 ion are present in NaCH3CO2 compound.

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Chapter 2 Solutions

Chemistry & Chemical Reactivity

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