Which of the following aqueous solutions has the highest boiling point?A. 1.25 M Ca(NO3)2B. 1.25 M KNO3C. 1.25 M CH3OHD. 2.50 M C6H12O6E. None of the above (all have the same boiling point)

The aqueous solution with the highest boiling point has been . Thus, option A is correct.

The boiling point can be defined as the temperature at which the liquid has been converted to the vapor state. The boiling temperature of different compounds has been dependent on the number of particles it has been dissociated.

Higher the dissociated particles = Higher is the boiling point

The dissociation has been calculated with the Van't Hoff factor. The Van't Hoff factor of the given compounds has been:

A. 1.25 M

The number of particles has been 3. Thus the Von't Hoff factor has been 3.

B. 1.25 M

The number of particles has been 2. Thus the Von't Hoff factor has been 1.

C. 1.25 M

The compound has been a non-electrolyte. The Van't hoff factor for a nonelectrolyte has been 1.

D. 2.50 M

The compound has been a non-electrolyte. The Van't hoff factor for a nonelectrolyte has been 1.

Since Calcium nitrate has the highest Van't hoff factor,  the boiling point of the compound has been the highest.

The aqueous solution with the highest boiling point has been . Thus, option A is correct.

For more information about the boiling point, refer to the link:

link

Ca(NO3)2 has the highest boiling point ( option A)

Explanation:

Step 1: Data given

A. 1.25 M Ca(NO3)2

B. 1.25 M KNO3

C. 1.25 M CH3OH

D. 2.50 M C6H12O6

Step 2: Calculate highest boiling point

The boiling point depends on the van't Hoff factor

This shows the particles produced when the substance is dissolved. For non-electrolytes dissolved in water, the van' t Hoff factor is 1.

Ca(NO3)2 → Ca^2+ + 2NO3- → Van't Hoff factor = 3

KNO3 → K+ + NO3- → Van't Hoff factor = 2

CH3OH is a non-elektrolyte → Van't Hoff factor = 1

C6H12O6 is a non-elektrolyte → Van't Hoff factor = 1

Ca(NO3)2 has the highest boiling point