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79 solutions

Freezing Point Depression

Q. The freezing point of water H2O is 0.00°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol). How many grams of antifreeze, CH2OHCH2OH (62.10 g/mol), must be dissolved in 246.0 grams of water to reduce the freezing point by 0.400°C?

Solved • Feb 4, 2020

Freezing Point Depression

Q. Water has a Kf of 1.86*C/m. When 3.25 g of a nonvolatile, nonelectrolyte are dissolved in 30.0 g of water, the freezing point of the solution was -2.35*C. Determine the molar mass of the unknown.

Solved • Feb 4, 2020

Freezing Point Depression

Q. Cyclohexane has a freezing point of 6.50 °C and Kr of 20.0 °C/m. What is the freezing point of a solution made by dissolving 0.463 g of biphenyl (C12H10) in 25.0 g of cyclohexane? Express the temperature numerically in degrees Celsius.

Solved • Jan 31, 2020

Freezing Point Depression

Q. Choose the solvent below that would show the greatest freezing point depression when used to make a 0.20 m nonelectrolyte solution. A.carbon tetrachloride, Kf= 29.9 °C/m . B.chloroform, Kf= 4.70 °C/m . C.benzene, Kf= 5.12 °C/m . D.ethanol, Kf= 1.99 °C/m . E.diethyl ether, Kf= 1.79 °C/m

Solved • Feb 2, 2020

Freezing Point Depression

Q. Which of the following solutions will have the lowest freezing point? A.0.075 mLiCl . D.0.075 mKCN . B.0.075 m(NH4)3PO4 E.0.075 mKNO2 . C.0.075 mNaBrO4

Solved • Feb 2, 2020

Freezing Point Depression

Q. Choose the solvent below that would show the greatest freezing point depression when used to make a 0.20 m nonelectrolyte solution. A.carbon tetrachloride, Kf= 29.9 °C/m . B.chloroform, Kf= 4.70 °C/m . C.benzene, Kf= 5.12 °C/m . D.ethanol, Kf= 1.99 °C/m . E.diethyl ether, Kf= 1.79 °C/m

Solved • Feb 2, 2020

Freezing Point Depression

Q. A sample of an organic compound (a nonelectrolyte) weighing 1.35 g lowered the freezing point of 10.0 g of benzene by 3.66 °C. Assuming ideal solution behavior, calculate the molar mass of the compound.

Solved • Jan 24, 2020