Question

a. What effect does adding a solute to a solvent have on the freezing point of the solvent? What equation describes the effect? b. What effect does adding a solute to a solvent have on the boiling point of the solvent? What equation describes the effect?

Answer 1

Answer:

a. Adding a solute to a solvent results in freezing point depression that is lowering of the freezing point of the solvent

The equation that describes the effect is $\Delta T_f = K_f \times m \times i$

b. The effect of adding a solute to a solvent have on the boiling point of the solvent is the elevation of the boiling point of the solvent

The equation that describes the effect of boiling point elevation is given as follows;

$\Delta T_b = K_b \times m \times i$

Explanation:

$\Delta T_f = K_f \times m \times i$

Where:

$\Delta T_f$ = $T_{f(pure \ solvent)}$ - $T_{f(solution)}$

$K_f$ = Constant for Molal freezing point

i = van't Hoff factor which is the number of irons present in each solute molecule

m = Molality of the solution

$\Delta T_b = K_b \times m \times i$

Where:

$\Delta T_b$ = $T_{f(pure \ solvent)}$ - $T_{f(solution)}$

$K_b$ = Constant for Molal freezing point

i = van't Hoff factor which is the number of irons present in each solute molecule

m = Molality of the solution