Question

13 fill in the blank 1 point a saturated solution of kcl at 90 °c is cooled to 10 °c. what amount of kcl will precipitate out of solution? answer 20 g 50 g 60 g 10 g 25 g previous

Explanation:

Step1: Recall solubility data of KCl

The solubility of KCl at 90°C is about 54 g per 100 g of water and at 10°C is about 31 g per 100 g of water.

Step2: Calculate the amount of precipitation

If we assume we have 100 g of water in the saturated - solution, the amount of KCl that will precipitate is the difference in solubility at the two temperatures. So, \(54 - 31=23\ g\). Among the given options, the closest value to 23 g is 25 g.

Answer:

25 g