Question

In a laboratory experiment, the freezing point of an aqueous solution of glucose is found to be -0.325°C, What is the molal concentration of this solution?

Answer 1

0.17 M is the is the molal concentration of this solution

Explanation:

Data given:

freezing point of glucose solution = -0.325 degree celsius

molal concentration of the solution =?

solution is of glucose=?

atomic mass of glucose = 180.01 grams/mole

freezing point of glucose = 146 degrees

freezing point of water = 0 degrees

Kf of glucose = 1.86 °C

ΔT = (freezing point of solvent) - (freezing point of solution)

ΔT = 0.325 degree celsius

molality =?

ΔT = Kfm

rearranging the equation:

m = $\frac{0.325}{1.86}$

m= 0.17 M

molal concentration of the glucose solution is 0.17 M