8
QuizMultiple Choice

Reversible Reactions and Equilibrium — Quiz

Question 8 • Chemistry

Which statement best describes how dynamic equilibrium relates to a saturated solution of sodium chloride?

Answer
A
Each second, solid sodium chloride dissolves and solid sodium chloride recrystallizes.
B
Each second, the amount of solid sodium chloride that dissolves equals the amount of solid sodium chloride that recrystallizes.
C
The concentration of the dissolved particles remains constant.
D
No more solid dissolves in a saturated solution.

Explanation

At dynamic equilibrium, sodium chloride continues to dissolve while dissolved ions recrystallize into solid salt. These processes occur at equal rates, so the amounts dissolving and recrystallizing each second are equal. This balance also keeps the solution’s concentration constant, but B most directly describes the dynamic equilibrium.

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