Question

A student conducts an experiment to determine the effect of adding salt on the boiling temperature of water. the results are shown below.

Answer 1

A student conducts an experiment to determine the effect of adding salt on the boiling temperature of water. The results are shown below.

S #ofsalt BoilTemp

S1 0g 100.0°C

S2 2g 102.3°C

S3 5g 104.8°C

S4 10g 107.5°C

Which is a value that should remain constant for all samples in this experiment?

a. Amount of salt added

b. Volume of water

c. Boiling Temperature

d. Time required for water to boil

On adding solute to specific volume of solvent, the vapor pressure of the solvent decrease as the solute added is salt which is non volatile solute. Thus, it increases the boiling point furthur on adding the solute.

The amount of salt added are 51 g, 52 g, 53 g, 54 g so the concentration of solute is changing.

Temperature of boiling of solution changes on addition of solute to solution.

The time required for the solution to boil varies with amoutn of solute added, as the vapor pressure of solution decreases.

Thus, the voume of water will remain contant as only amount of salt added varies.