Chapter 6, Problem 54E

In each box, write the chemical formula of the compound formed by the cation at the head of the column and the anion at the left of the row, and then write the name of the compound. Refer only to a clean periodic table when completing this exercise.

Ions	Na+	Hg2+	NH4+	Pb2+	Mg2+	Fe3+	Cu2+
OH-
BrO-
CO32-
ClO32-
HSO4-
Br-
PO43-
IO4-
S2-

Interpretation Introduction

Interpretation:

In each box, the chemical formula of the compound formed by the cation at the head of the column and the anion at the left of the row is to be written, and then the name of the compound is to be written.

Ions	Na+	Hg2+	NH4+	Pb2+	Mg2+	Fe3+	Cu2+
OH-
BrO-
CO32-
ClO32-
HSO4-
Br-
PO43-
IO4-
S2-

Concept introduction:

Generally, the elements are found as single atom particles in the universe. Moreover, some elements form monoatomic ions having different charges. To differentiate the two ions, size of the charge of ions is included when naming the ion. Conversely, for group 1A, 2A, 5A-7A elements the charge is not included while naming the ion. In common, the charge is given in the name of an ion only when the ions of an element display more than one charge which is common

Answer to Problem 54E

Ions	Na+	Hg2+	NH4+
OH-	NaOH Sodium hydroxide	Hg(OH)2 Mercury(II) hydroxide	NH4OH Ammonium hydroxide
BrO-	NaBrO Sodium hypobromite	Hg(BrO)2 Mercury(II) hypobromite	NH4BrO Ammonium hypobromite
CO32-	Na2CO3 Sodium carbonate	HgCO3 Mercury(II) carbonate	(NH4)2CO3 Ammonium carbonate
ClO32-	NaClO3 Sodium chlorate	Hg(ClO3)3 Mercury(II) chlorate	NH4ClO3 Ammonium chlorate
HSO4-	NaHSO4 Sodium hydrogen sulfate	Hg(HSO4)2 Mercury(II) hydrogen sulfate	NH4HSO4 Ammonium hydrogen sulfate
Br-	NaBr Sodium bromide	HgBr2 Mercury(II) bromide	NH4Br Ammonium bromide
PO43-	Na3PO4 Sodium phosphate	Hg3(PO4)2 Mercury(II) phosphate	(NH4)2PO4 Ammonium phosphate
IO4-	NaIO4 Sodium periodate	Hg(IO4)2 Mercury(II) periodate	NH4IO4 Ammonium periodate
S2-	Na2S Sodium sulfide	HgS Mercury(II) sulfide	(NH4)2S Ammonium sulfide

Ions	Pb2+	Mg2+	Fe3+	Cu2+
OH-	Pb(OH)2 Lead(II) hydroxide	Mg(OH)2 Magnesium hydroxide	Fe(OH)3 Iron(III) hydroxide	Cu(OH)2 Copper(II) hydroxide
BrO-	Pb(BrO)2 Lead(II) hypobromite	Mg(BrO)2 Magnesium hypobromite	Fe(BrO)3 Iron(III) hypobromite	Cu(BrO)2 Copper(II) hypobromite
CO32-	PbCO3 Lead(II) carbonate	MgCO3 Magnesium carbonate	Fe2(CO3)3 Iron(III) carbonate	CuCO3 Copper(II) carbonate
ClO32-	Pb(ClO3)2 Lead(II) chlorate	Mg(CIO3)2 Magnesium chlorate	Fe(CIO3)3 Iron(III) chlorate	Cu(CIO3)2 Copper(II) chlorate
HSO4-	Pb(HSO4)2 Lead(II) hydrogen Sulfate	Mg(HSO4)2 Magnesium hydrogen sulfate	Fe(HSO4)3 Iron(III) hydrogen Sulfate	Cu(HSO4)2 Copper(II) hydrogen sulfate
Br-	PbBr2 Lead(II) bromide	MgBr2 Magnesium bromide	FeBr3 Iron(III) bromide	CuBr2 Copper(II) bromide
PO43-	Pb3(PO4)2 Lead(II) phosphate	Mg3(PO4)2 Magnesium phosphate	FePO4 Iron(III) phosphate	Cu3(PO4)2 Copper(II) phosphate
IO4-	Pb(IO4)2 Lead(II) periodate	Mg(IO4)2 Magnesium periodate	Fe(IO4)3 Iron(III) periodate	Cu(IO4)2 Copper(II) periodate
S2-	PbS Lead(II) sulfide	MgS Magnesium sulfide	Fe2S3 Iron(III) sulfide	CuS Copper(II) sulfide

Explanation of Solution

When an ionic compound having a metal that can exist in more than one ionic charge, is named the charge of metal atom should be included in the compound name. For example, Fe₂(CO₃)₃ is named as iron(III) carbonate. The roman letters present in the parentheses indicate the oxidation state of the metal atom. By following the same set of rules the ionic compounds of various metal atoms can be named.

Conclusion

Thus, the names and molecular formula of ionic compounds are stated.