Question

is the boiling point of a 2.5 m aqueous sugar solution greater than, less than, or the same as the boiling of aqueous sodium chloride solution?

Greater than

Less than

The same as

Impossible to determine

Answer 1

Sodium Chloride dissociates to give sodium ion and chloride ion, hoever, sugar is not ionisable. Boiling point being a colligative property, addition of solute leads to decrease in vapour pressure and hence boiling point increases. Since, Sodium ion dissociates to give two ions (Van't Hoff factor = 2), boiling point of aqueous sodium chloride (2.5 m) will be more than that of sugar solution (2.5 m).

the boiling point of a 2.5 m aqueous sugar solution less than the boiling of aqueous sodium chloride solution