Answer to Question #185645 in General Chemistry for Joshua

Question

1. State the effect that dissolving a solute has on each of the following physical properties of a solvent.

a. Boiling Point

b. Freezing Point

2. Explain why the colligative properties of a solvent are affected more by the dissolving of an electrolyte compared to an equal amount of a nonelectrolyte.

3. Are the values of Kf and Kb dependent on the identity of the solvent, the solute, or both? Explain.

Answer 1

1. a. boiling point increases.

b. freezing point decreases

2. Electrolytes are compounds that dissociate when they dissolve. Since more particles are produced, the effect on the colligative properties is greater for electrolyte solutions than for nonelectrolyte solutions which do not dissociate

3. The value of K_b or K_f depends only on the type of solvent and not solute dissolved in it.

Here, K_b and K_f are molal elevation in boiling point constant and molal depression in freezing point constant respectively.

They are characteristic of solvent and independent of the solute.