Chemistry Homework Help

24/7 Chemistry Homework Help

Get step-by-step solutions from expert tutors.

How it works?

Ask a question

Type, take a picture, or paste your question with all necessary details to ensure high-quality responses.

Get an answer in less than 24hrs

Once our tutors receive the question, they'll begin. You'll get an email once the solution is ready.

Get Notified

We will send you email and text notification to let you know when your question is answered.

Browse Homework Solutions

48 solutions

Freezing Point Depression

Q. Cyclohexane has a freezing point of 6.50 ∘C and a Kf of 20.0 ∘C/m. What is the freezing point of a solution made by dissolving 0.925 g of biphenyl (C12H10) in 25.0 g of cyclohexane? Express the temperature numerically in degrees Celsius.

Solved • Nov 12, 2019

Freezing Point Depression

Q. A solution consisting of 0.250 mol of methylbenzene, C6H5CH3, in 246 g of nitrobenzene, C6H5NO2, freezes at -1.1℃. Pure nitrobenzene freezes at 6.0℃. What is the freezing-point depression constant of nitrobenzene? a. 3.5℃/m b. 28℃/m c. 4.4℃/m d. 14℃/m e. 7.0 ℃/m

Solved • Oct 25, 2019

Freezing Point Depression

Q. What is the freezing point depression of an aqueous 1.80 molal KCl solution? (Kf = 1.86 ˚C kg/m)

Solved • Oct 25, 2019

Freezing Point Depression

Q. Determine the mass of a nonvolatile, nonionizing compound that must be added to 3.90 kg of water to lower the freezing point to 98.70 °C. The molar mass of the compound is 50.0 g/mol and the Kf for water is 1.86 °C•kg/mol.

Solved • Oct 25, 2019

Freezing Point Depression

Q. Please help me understand the steps to solving this problem

Solved • Oct 25, 2019

Freezing Point Depression

Q. Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolate from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution could be measured as 5.144 oC. Pure benzene freezes at 5.444 and has a value for the molar freezing point depression constant of Kf of 5.12 oC/m. What is the approximate molar mass of thyroxine?

Solved • Oct 25, 2019

Freezing Point Depression

Q. The freezing point of t-butanol is 25.5 oC and Kf is 9.1 oC.kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 10g sample of t-butanol is 24.59 oC. How many grams of water are present in the sample?

Solved • Oct 24, 2019