100g of a saturated solution of KNO3 was cooled from 80 degrees to 50 degrees. What mass of KNO3 would be expected to crystallise out of the solution?

Answer 1

Few people memorize solubility tables. Surely you have a graph or table giving the solubility of KNO3 vs temperature. If you will post the solubility in those tables/graph at 80 C and 50 C I can show you how to do this.

Answer 2

KNO3 solubility at 80 C is 180g/100g
KNO3 solubility at 50 C is 78g/100g

Answer 3

kCl at 40 degrees