Question

Which of the following solutions will have the highest boiling point?

Answer 1

Explanation:

Ionic compounds are formed when two opposite charge atoms combine together. Therefore, there is strong force of attraction between the ions.

In order to break this ionic bond, high heat is required. As a result, the boiling point of ionic compounds is high.

Out of the given options, $CaCl_{2}$, KCl, and NaCl are all ionic compounds because the bond formation in these compounds is due to the transfer of electrons.

Hence, all these solutions have high boiling point.

Whereas $FeCl_{3}$ is a covalent compound, that is, it is formed by sharing of electrons. There is weak force of attraction between iron and chlorine atoms thus, $FeCl_{3}$ has low boiling point.

Therefore, we can conclude that solutions with highest boiling point are as follows.

• 1 molar $CaCl_{2}$ solution.
• 1 molar KCl solution.
• 1 molar NaCl solution.