Chapter 8, Problem 1STP

Interpretation Introduction

Interpretation :

The best microscopic representation of an aqueous solution of calcium chloride must be chosen from the given list.

Concept Introduction :

Calcium chloride dissociates in aqueous solution to produce one Ca²+ and 2 Cl^-.

Answer to Problem 1STP

Correct answer: Option B is correct.

Explanation of Solution

Reason for correct option: Option B is correct because in this representation one Ca²+ ion and 2 Cl- ions are shown which is expected from the dissociation of calcium chloride.

  ${\text{CaCl}}_{\text{2}}\text{(aq)}\to {\text{Ca}}^{\text{2+}}{\text{(aq)+2Cl}}^{\text{-}}\text{(aq)}\text{.}$

Conclusion

Reasons for incorrect options: Option A is incorrect as one Ca²+ and one Cl- is shown.

Option C is incorrect as two Ca²+ ions and one Cl- ion is shown.

Option D is incorrect as one Ca²+ ion and three Cl- ions are shown.