Answer to Question #188252 in General Chemistry for Ivan

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)The solute raises the boiling point by an amount that depends on the number of particles it contributes go the solution.

b)The presence of a solute lowers the freezing point of any solvent; this effect is called freezing-point depression.

2.Nonelectrolyte solutions are those in which the solute does not dissociate into ions when dissolved; sugar does not dissociate, for example. The number of moles of dissolved particles is greater for electrolyte solutions, so there will be a greater impact on colligative properties.

3.The value of Kb or Kf depends only on the type of solvent & not solute dissolved in it.