Question

A saturated solution of potassium chlorate is dissolved in 100g of water. If the saturated solution is cooled from 90 degrees Celsius to 60 degrees Celsius, how many grams would crystallize out?

Answer 1

Mass would crystallize out : 24 g

Further explanation

Solubility is the maximum amount of a substance that can dissolve in some solvents. Factors that affect solubility

• 1. Temperature:
• 2. Surface area:
• 3. Solvent type:
• 4. Stirring process:

We can use solubility graph to solve this.

solubility KClO₃ at 90°C=52 g

solubilty KCl₃ at 60°C= 28 g

Mass would crystallize out = 52 - 28 =24 g