Question

When 100 g of a saturated solution is evaporated at ${50}^{o}C$, 50 g of solid is left over. Find the solubility of the substance at ${50}^{o}C$.

• A. 100
• B. 50
• C. 75
• D. 28

Answer 1

The correct option is A 100

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 )$\times$100

So, at 50°C before the evaporation,

$solubility=50/50\times 100=100$