Chapter 9, Problem 133A

Interpretation Introduction

(a)

Interpretation:

The formula for the compound that made from copper (I) and sulfate pairs of ions needs to be determined.

Concept introduction:

For a compound, molecular formula is the multiple of empirical formula.

Empirical formula is simplest ratio of atoms present in the compound.

Answer to Problem 133A

Formula of copper (I) sulfate is ${\text{Cu}}_{\text{2}}{\text{SO}}_{\text{3}}$.

Explanation of Solution

The given ions pair is copper (I) and sulfate. Copper (I) has +1 charge and sulfate has -2 charges. Two copper ions are required to balance the charge on sulfate. Thus the formula of copper (I) sulfate is ${\text{Cu}}_{\text{2}}{\text{SO}}_{\text{3}}$.

(b)

Interpretation Introduction

Interpretation:

The formula for the compound that made from tin (IV) and fluoride pairs of ions needs to be determined.

Concept introduction:

For a compound, molecular formula is the multiple of empirical formula.

Empirical formula is simplest ratio of atoms present in the compound.

Answer to Problem 133A

Formula of tin (IV) and fluoride is ${\text{SnF}}_{\text{4}}$.

Explanation of Solution

The given ions pair is tin (IV) and fluoride. Tin (IV) has +4 charge and fluoride has -1 charge. Thus the formula of tin (IV) and fluoride is ${\text{SnF}}_{\text{4}}$.

(c)

Interpretation Introduction

Interpretation:

The formula for the compound that made from gold (III) and cyanide pairs of ions needs to be determined.

Concept introduction:

For a compound, molecular formula is the multiple of empirical formula.

Empirical formula is simplest ratio of atoms present in the compound.

Answer to Problem 133A

Formula of gold (III) and cyanide is $\text{Au}{\left(\text{CN}\right)}_{\text{3}}$.

Explanation of Solution

The given ions pair is gold (III) and cyanide. Gold (III) has +3 charges and cyanide has -1 charge. Thus the formula of gold (III) and cyanide is $\text{Au}{\left(\text{CN}\right)}_{\text{3}}$.

(d)

Interpretation Introduction

Interpretation:

The formula for the compound that made from lead (II) and sulfide pairs of ions needs to be determined.

Concept introduction:

For a compound, molecular formula is the multiple of empirical formula.

Empirical formula is simplest ratio of atoms present in the compound.

Answer to Problem 133A

Formula of lead (II) and sulfide is PbS.

Explanation of Solution

The given ions pair is lead (II) and sulfide. Lead (II) has +2 charges and sulfide has -2 charges. Thus the formula of lead (II) and sulfide is PbS.