Chemistry
posted by Hannah on .
A solution was made by dissolving 62.07 grams of a compound in 500g of water. The compound was not ionic. The freezing point of the solution was measured and found to be 1.86 degrees celsius. Using the Kf value in your textbook, the molar mass of this conpound can be calculated to be?
I am not sure what Kf value they are referring to for me to find. Would I use the freezing point equation for this?

Yes, delta T = Kf*m
Solve for m
Then m = mols/kg solvent
You know m and kg solvent, solve for mol.
Then mol = grams/molar mass
You know mol and grams, solve for molar mass. 
so delta T would be 1.86 but Im not sure what Kf would be?

Kf = Kf = Kf. What have you been using for Kf for water? Isn't that 1.86. I know what's confusing you. delta T = 1.86 and Kf is 1.86. Just plug it into the equations and the math will work out.