Need help with these questions since I dont know the solution from it

Question

1.) What is the freezing-point depression of a 0.500-m solution of a solute in acetic acid?

2.)A solution of an unknown solute in water has a boiling temperature of 100.255°C. What is the molal concentration of the solution?

Thank you :)

Answer 1

1)

∆T = imK

∆T = change in freezing point temp = ?

i = van't Hoff factor = 1 if the solute is a non electrolyte (the problem doesn't state the nature of the solute)

m = molality = moles/kg solvent = 0.500

K = freezing constant for acetic acid (problem doesn't tell us, so look it up)

Plug in the values and solve for ∆T and that will be your answer.

2)

∆T = imK

∆T = change in boiling point temp = 0.255º (since water normally boils at 100º)

i = van't Hoff factor = 1 for a non electrolyte (again, problem doesn't state nature of the solute)

m = molality = mol/kg

K = freezing constant for H2O = 1.86º/m

The problem also doesn't tell us the amount of water so we can't answer this question.