Question

Some solid KNO3 remains at the bottom of a stoppered flask containing a saturated KNO3(aq) solution at 22°C. Which statement explains why the contents of the flask are at equilibrium?The rate of dissolving is equal to the rate of crystallization.The rate of dissolving is greater than the rate of crystallization.The concentration of the solid is equal to the concentration of the solution.The concentration of the solid is greater than the concentration of the solution.

Answer 1

Answer: The rate of dissolving is equal to the rate of crystallization.

Answer 2

The rate of dissolving is equal to the rate of crystallization.

Step-by-step explanation:

In order for a reaction to be at equilibrium, the rate of formation of products of that reaction must be equal to the rate of formation of reactants.

In other words, the rate of forward reaction must be equal to the rate of reverse reaction.

Hence, for the reaction involving the crystallization of solid
`KNO_3` from aqueous
`KNO_3`, the rate of dissolution of the solid must be equal to the rate of crystallization.