Question

Adding 1.00 g of benzene, C6H6, to 80 g of cyclohexane, C6H12, lowers the freezing point of the cyclohexane from 6.5 to 3.3 degree celsius. What is the value of kf for cyclohexane?
delta T = Kf*molality
mols benzene = grams/molar mass = ?
molality = mols benzene/kg cyclohexane
You know m and delta T, solve for Kf.

Related Questions

10.0 g sample of p-dichlorobenzene, a component of mothballs, is dissolved in 80.0 g of benzene, C6... Calculate the freezing point of a solution of 20.0 g methyl salicylate, C7H6O2, dissolved in 800 g o... What will be the freezing point of a solution made by dissolving 5.25 g of naphthalene (C10H8) in 10... Benzene (C6H6) has a normal freezing point of 5.50oC and a density of 0.88 g/mL. When 1.28 g of naph...