Chapter 4.2, Problem 6RQ

Interpretation Introduction

Interpretation :

The given table needs to be completed.

Concept Introduction :

Ionic compounds-Compounds that consist of the ionic form of elements are known as ionic compounds. Atoms that gain or lose electrons are converted into ions. Ions may carry a negative charge when the gain of electrons takes place and a positive charge when the loss of electrons takes place.

Answer to Problem 6RQ

Complete table is given below-

Name	Formula
Potassium nitrate	${\text{KNO}}_{\text{3}}$
Sodium sulfate	${\text{NaSO}}_{\text{4}}$
Lead(II) oxide	$\text{PbO}$
Sodium bisulfate	${\text{NaHSO}}_{\text{4}}$
Sulfurous acid	${\text{H}}_{\text{2}}{\text{SO}}_{\text{3}}$
Ferrous sulfate	${\text{FeSO}}_{\text{4}}$
Potassium chlorate	${\text{KClO}}_{\text{3}}$
Nitrous oxide	$\text{NO}$
Hydrogen peroxide	${\text{H}}_{\text{2}}{\text{O}}_{\text{2}}$
Potassium dichromate	${\text{K}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$
Sulfur tetrafluoride	${\text{SF}}_{\text{4}}$
Ammonium chloride	${\text{NH}}_{\text{4}}\text{Cl}$

Explanation of Solution

The ionic compounds are formed by the loss or gain of the electrons. In ionic compound, atoms are bonded with an ionic bond. The ions have balanced their charges and gets neutral.

The name of the ionic compound represents the element name present in it. For example- Potassium nitrate contains potassium and nitrate means N and O atoms are present.

In the ionic compounds, the cation must be written first followed by an anion. For example- ${\text{NH}}_{\text{4}}\text{Cl}$ , there is ammonium ion which is a cation and should be written first followed by chloride.

The charge of cation and anion are interchanged to balance the compounds. For example- in ${\text{NaSO}}_{\text{4}}$ , sodium ion has a $1$ positive charge and sulfate ion has $1$ negative charge, and the ionic compound has balanced or neutral charge.

Hence from the above discussion, the complete table is given as -

Name	Formula
Potassium nitrate	${\text{KNO}}_{\text{3}}$
Sodium sulfate	${\text{NaSO}}_{\text{4}}$
Lead(II) oxide	$\text{PbO}$
Sodium bisulfate	${\text{NaHSO}}_{\text{4}}$
Sulfurous acid	${\text{H}}_{\text{2}}{\text{SO}}_{\text{3}}$
Ferrous sulfate	${\text{FeSO}}_{\text{4}}$
Potassium chlorate	${\text{KClO}}_{\text{3}}$
Nitrous oxide	$\text{NO}$
Hydrogen peroxide	${\text{H}}_{\text{2}}{\text{O}}_{\text{2}}$
Potassium dichromate	${\text{K}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$
Sulfur tetrafluoride	${\text{SF}}_{\text{4}}$
Ammonium chloride	${\text{NH}}_{\text{4}}\text{Cl}$

Conclusion

From the name of ionic compounds and formula, the information about the element present in the compounds and charges of the ion can be obtained.