Question

4) Tert-butanol is an alcohol. Would the addition of another alcohol as the impurity have affected the freezing point and boiling point of tert-butanol? a) Yes, because colligative properties depend on the number of impurity particles and NOT on their chemical properties b) No, because colligative properties depend on the chemical properties of the impurity and NOT on the amount of particles c) Only if the same amounts of the alcohol impurity and tert-butanol are mixed

Answer 1

Addition of alcohol to the tert butanol as impurity will affect the boiling point and freezing point

a)Because colligative properties depends on the number of particles not on the chemical properties.

Colligative properties are defined as the properties which are dependent impurity particles added to the solution. Freezing point depression and boiling point rise are colligative properties. It increases with increase in impurity particles. The reason behind it is these properties will depend on intermolecular interaction of solvent molecules and addition of impurity particles will decrease the interaction henceforth one need go more lower temperature to freeze the solvent and more higher temperature to boil it as impurity will act as a hindrance.