A sugar solution is prepared by adding 3.50 g of sugar to 22.5 mL of a pure liquid and the freezing point of the sugar solution was determined to be -99.84 C. If the normal freezing point of the pure liquid is -97 C and the density is .792g/mL, what is the freezing point depression constant in degrees celsius?
A sugar solution is prepared by adding 3.50 g of sugar to 22.5 mL of a...
A solution is prepared by dissolving 2.00 g of glycerin (C3H8O3) in 201 g of ethanol (C2H5OH). The freezing point of the solution is _______ degrees celsius. The freezing point of pure ethanol is -114.6 degrees celsius at 1atm. The molal-freezing point depression constant (Kf) for ethanol is 1.99 degrees celsius/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively.
This solution of unknown a in napthalene was prepared by adding 2.70 mL of unknown a (D=1.25g/mL) to 19.950 g of napthalene. using this data and your answer to the previous question (my answer was freezing point depression=8 degrees C). calculate the molar mass of unknown a. kf of napthalene is 6.94 c*kg/mol please show all work
8. What is the final boiling point of a 1.25 molal solution of sugar in water? The Kb for water is 0.512 C/m. (For sugar i = l.) 9. A solution was prepared by dissolving 0.52 mol hexane into 400g CCl4. What is the change in freezing point of this solution? Carbon tetrachloride has a freezing point depression constant of 29.8 Cm,and freezes at-23。. 10. A solution was prepared by dissolving 0.26 moles of ethanol (C2HsOH) into 750g Diethyl ether....
A solution of ethylene glycol in water at 20 degrees celsius has a mass percent of 9.78% of ethylene glycol with a density of 1.0108 g/mL. The freezing point depression constant for water (solvent for all solutions) is Kf=-1.86 percent celsius kg/mol and the boiling point elevation constant is Kb=0.512 degrees celsius kg/mol. The density of neat water at 20.0 degrees celsius is 0.9982 g/mL. Answer the following: 1. What is the molarity of the solution? 2. What is the...
A solution is prepared by dissolving 5.00 g of glycerin () in 201 g of ethanol The freezing point of the solution is ________°C. The freezing point of pure ethanol is -114.6 °C at 1 atm. The molal-freezing-point-depression constant () for ethanol is 1.99 °C/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively. -115.1 -119.4 0.537 -109.8 -114.1
2. A solution is prepared by dissolving 7.00 g of glycerin (C3H8O3) in 201 g of ethanol (C2H5OH). The freezing point of the solution is __________°C. The freezing point of pure ethanol is -114.6 °C at 1 atm. The molal-freezing-point-depression constant (Kf) for ethanol is 1.88 °C/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively.
Determine the freezing point of a solution that contains 65.4 g of naphthalene (C10H8) dissolved i 835 mL of benzene (density -0.877 g/mL). Pure benzene has a freezing point of 5.50°C and a freezing point depression constant of 4.90°C/m.
A solution was made by adding 800 g of ethanol, C2H5OH, to 8 x 103 g of water. How much would this lower the freezing point? Kf of H2O is 1.86 degrees Celsius/m The answer is supposed to be 4.1 degrees Celsius, but I got 3.98287 degrees Celsius. What did I do wrong?
What is the freezing point of a solution that contains 22.5 g of urea, CO(NH2)2, in 205 mL water, H2O? Assume a density of water of 1.00 g/mL.
A pure solvent freezes at 6.35 degrees Celsius and a pure solute freezes at 832.0 degrees Celsius. The molar mass of the solvent is 96.4 g/mol and the molar mass of the solute is 78.5 g/mol. The freezing point depression constant for the solvent is 6.33 degrees/m. A solution is made of 1.012 g of the solute and 15.280 g of the solvent, determine its freezing point in degrees Celsius.