Question

When 100g of saturated solution is evaporated at 50 C, 50 g of solid is left over. find the solubility of the substance at 50C

Answer 1

Here, at 50 °C, the solid solute obtained is = 50 gm
Since, we had the saturated solution = 100 gm
It means there must be  50 gm of water in the saturated solution
Hence, solubility of solute = (weight of solute in saturated solution/ weight of solvent in saturated solution ) x 100
So, at 50°C before the evaporation,
solubility = (50/50 ) x 100 = 100 

Answer 2

Since 50 g solid is left over
So solubility=200-50=150g
Percent of solubility=150/200 ×100
= 75℅