Question

Arrange the following aqueous solutions each of strength 0.1 molarity in order of increasing freezing and boiling point. Justify your answer: C2H5OH, Ba3(PO4)2, Na2SO4, KCl, Li3PO4

Answer 1

To arrange the given aqueous solutions in order of increasing freezing and boiling points, we need to consider the number of solute particles present in the solution. Strong electrolytes dissociate into multiple ions, while weak electrolytes partially dissociate and nonelectrolytes do not dissociate. Based on this information, the solutions can be ranked in order of increasing freezing and boiling points.

Step-by-step explanation:

To arrange the given aqueous solutions in order of increasing freezing and boiling points, we need to consider the effect of each solute on the colligative properties of the solution. The molality of each solution is given as 0.1 molarity.

The colligative properties, such as freezing and boiling point depression, are affected by the number of solute particles present in the solution. Strong electrolytes, like Na2SO4, Ba3(PO4)2, and KCl, dissociate into multiple ions, increasing the number of particles and causing a larger effect on the freezing and boiling points. Weak electrolytes, like C2H5OH, partially dissociate into ions, while nonelectrolytes, like Li3PO4, do not dissociate.

Based on this information, we can rank the solutions in order of increasing freezing and boiling points:

1. Li3PO4
2. C2H5OH
3. Na2SO4
4. Bar3(PO4)2
5. KCl