When 50cm2 of a saturated solution of sugar of molar mass 342 g at 40oC was evaporated to dryness, 34.2g of dry solid was obtained. The solubility of sugar at 40oC is
-
2.0 mol dm-3
- 3.5 mol dm-3
- 7.0 mol dm-3
- 10.0 mol dm-3
The correct answer is: A
Explanation
solubility = mole * 1000cm3/volumemass/molar mass * 1000cm3/volume
= 34.2/342 * 1000cm3/50cm3-3