Chapter 8, Problem 95A

Interpretation Introduction

(a)

Interpretation:

For the molecule sulfur difluoride, formula needs to be given.

Concept introduction:

A binary compound comprises of two nonmetal atoms. For naming this compound, first write the name of first element, then second element formula is named by using its root and adding suffix-ide. Prefix is used to identify the atom’s number in each element.

Answer to Problem 95A

Formula of sulfur difluoride is ${\text{SF}}_2$.

Explanation of Solution

From the name sulfur difluoride, it is clear that one sulfur and 2 fluoride is present in this molecule. Prefix di represents 2. Symbol of sulfur is S and fluorine is F. While writing a chemical formula second element is named by using its root with adding suffix −ide. Hence, the formula of the molecule is ${\text{SF}}_2$.

Interpretation Introduction

(b)

Interpretation:

For the molecule silicon tetrachloride, formula needs to be given.

Concept introduction:

A binary compound comprises of two nonmetal atoms. For naming this compound, first write the name of first element, then second element formula is named by using its root and adding suffix-ide. Prefix is used to identify the atom’s number in each element.

Answer to Problem 95A

Formula of silicon tetrachloride is ${\text{SiCl}}_4$.

Explanation of Solution

From the name silicon tetrachloride, it is clear that one silicon and 4 chlorine is present in this molecule. Prefix tetra represents 4. Symbol of silicon is Si and chlorine is Cl. While writing a chemical formula second element is named by using its root with adding suffix −ide. Hence, the formula of the molecule is ${\text{SiCl}}_4$.

Interpretation Introduction

(c)

Interpretation:

For the molecule carbon tetrafluoride, formula needs to be given.

Concept introduction:

A binary compound comprises of two nonmetal atoms. For naming this compound, first write the name of first element, then second element formula is named by using its root and adding suffix-ide. Prefix is used to identify the atom’s number in each element.

Answer to Problem 95A

Formula of carbon tetrafluoride is ${\text{CF}}_{\text{4}}$.

Explanation of Solution

From the name carbon tetrafluoride, it is clear that one sulfur and 2 fluoride is present in this molecule. Prefix di represents 2. Symbol of carbon is C and fluorine is F. Prefix tetra represents 4. While writing a chemical formula second element is named by using its root with adding suffix −ide. Hence, the formula of the molecule is ${\text{CF}}_{\text{4}}$.

Interpretation Introduction

(d)

Interpretation:

Formula of the molecule sulfurous acid, formula needs to be given.

Concept introduction:

Oxyacid contains one H atom and oxyanion. Oxyanions are polyatomic ion having one or more oxygen atoms. In the naming of oxyacid, first identify the oxanion. The first word of an oxyacid’s name comprises of the root of the oxyanion and the prefix per- or hypo- if it is part of the name, and a suffix. If the oxyanion’s name ends with the -ate suffix, replace it with the -ic suffix. If the name of the oxyanion ends with the suffix -ite, replace it with the suffix -ous.

Answer to Problem 95A

Formula of sulfurous acid is ${\text{H}}_2{\text{SO}}_3$.

Explanation of Solution

From the name sulfurous acid, it is clear that it is sulfite acid. The suffix −ite is replaced by −ous. Hence, the formula of the molecule is ${\text{H}}_2{\text{SO}}_3$.