When calculating the freezing allude of a solution, we’re walk to use the equation because that Freezing suggest Depression.

You are watching: What is the freezing point of lauric acid

∆Tf=i·Kf·m

∆Tf = readjust in freezing allude = Tf pure solvent –Tf solutionKf = freezing allude depression constanti = van" t Hoff variable of the solute = no. The ionsm = molality

Part a.)We"re gift asked to calculation molality (m), in mol/kg. The Kf worth for lauric mountain is 3.9°C•kg/mol.

Using freezing allude depression to uncover molecular weight

Mass that Lauric acid (g) 8.003

Mass of benzoic acid (g) 1.010

Freezing temperature of pure lauric acid (C°) 43.84

Freezing temperature of the benzoic acid-lauric mountain mixture (C°) 39.05

a. Calculation molality (m), in mol/kg, making use of the formulaΔt = Kf *m. The Kf worth for lauric acid is 3.9°C•kg/mol.

b. Calculate moles that benzoic mountain solute, making use of the molality and also the fixed (in kg) that lauric acid solvent.

c. Calculation the speculative molecular weight of benzoic acid, in g/mol.

d. Determine the accepted molecular load of benzoic mountain from its formula, C6H5COOH.

e. Calculation the percent discrepancy in between the experimental and also accepted values.

Learn this object by watchingThe Colligative Properties principle Videos
All Chemistry Practice problems The Colligative Properties practice Problems
Q.
Q.
Q.
Q.
See all problems in The Colligative Properties

Frequently inquiry Questions

What scientific concept do you need to understand in bespeak to resolve this problem?

Our tutors have actually indicated that to settle this trouble you will need to use the The Colligative nature concept. You can view video clip lessons to discover The Colligative Properties. Or if friend need an ext The Colligative nature practice, girlfriend can additionally practice The Colligative Properties practice problems.

What is the challenge of this problem?

Our tutors rated the difficulty ofUsing freezing suggest depression to find molecular weightMass...as high difficulty.

How long does this trouble take come solve?

Our professional Chemistry tutor, Dasha took 10 minutes and also 33 seconds to deal with this problem. You have the right to follow their measures in the video clip explanation above.

What professor is this problem relevant for?

Based on our data, us think this trouble is pertinent for Professor Kofoed's class at Utah State University.

topics
schools
discover
ACCOUNT
legitimate © 2021 Clutch Learning, Inc. Clutch prep is not sponsored or endorsed by any college or university.
×

OR
email