Chapter 10, Problem 15STP

Interpretation Introduction

Interpretation:

The incorrect formula for an ionic compound needs to be determined.

Concept introduction:

Chemical formula or molecular formula represents the type of atoms and number of atoms present in a molecule using numerical subscripts and atomic symbol.

Answer to Problem 15STP

Correct Answer: Option (c)

Explanation of Solution

Reason for correct option:

The formula for the given ionic compound can be derived by using the charge carried by an atom or group of atoms. Thus, the formula for given compound is derived as follows:

(c)

Thus, ${\text{Al}}_{\text{3}}{\text{S}}_{\text{2}}$ is not correct formula for an ionic compound.

Conclusion

Reason for incorrect option:

(a)

Thus, ${\text{CaCl}}_{\text{2}}$ is the correct formula for an ionic compound.

(b)

Thus, ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}$ is the correct formula for an ionic compound.

(d)

Thus, $\text{Mg}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ is the correct formula for an ionic compound.

(e)

Thus, $\text{NaCl}$ is the correct formula for an ionic compound.