Question

Out of 0.1 molal aqueous solution of glucose and sodium chloride respectively. Which one will have high boiling point?

Answer 1

The salt solution will have the higher boiling point....

Explanation:

Boiling point elevation is a colligative property that depends on the number of particles in solution. Sodium chloride in aqueous solution speciates according to the following equation:

`NaCl(s) stackrel(H_2O)rarrunderbrace(Na^+ + Cl^-)_"2 equiv of particles in solution"`

And if you like you could certainly call this a chemical reaction.

On the other hand, glucose DOES NOT speciate in aqueous solution, and a given molality (i.e. the same as that for `NaCl(aq)`) will result in the SAME number of particles in solution.

`C_6H_12O_6(s) stackrel(H_2O)rarrunderbrace(C_6H_12O_6(aq))_"1 equiv of particles in solution"`