(a) At temperature 313K to prepare 50 gms of potassium nitrate, we require 319 of potassium nitrate in 100 gms of water.
(b) Pragya observed that As solution of potassium nitrate cools, it dissolves slowly.
1. At temperature 293 K, 32 gm of potassium nitrate dissolves.
2. At temperature 293K, solubility of NaCl is 36 gm.
3. At temperature 293K, solubility of KCl is 35 gm.
4. At temperature 293K, solubility of NH4Cl is 37 gm.
(d) As temperature increases, rate of solubility increases.