Tea leaves from ter (h) Iron pins from sand (i) Wheat grains from husk (i) Fine mud particles suspend solution, solvent, solute, dissolve, soluble. Whe words and residue. 3. Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).

\multirow{2}{*}{ Substance Dissolved }	Temperature in K
	283	293	313	333	353
{ 2 - 6 }	Solubility
Potassium nitrate	21	32	62	106	167
Sodium chloride	36	36	36	37	37
Potassium chloride	35	35	40	46	54
Ammonium chloride	24	37	41	55	66

1. What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at $313\mathrm{K}$ ?
2. Pragya makes a saturated solution of potassium chloride in water at $353\mathrm{K}$ and leaves the solution to cool at room temperature. What would she observe as the solution cools? Explain.
3. Find the solubility of each salt at $293\mathrm{K}$. Which salt has the highest solubility at this temperature?
4. What is the effect of change of temperature on the solubility of a salt?