Question

Calculate the freezing point and boiling point of a solution containing 7.80 g of ethylene glycol...

Calculate the freezing point and boiling point of a solution containing 7.80 g of ethylene glycol (C2H6O2) in 93.4 mL of ethanol. Ethanol has a density of 0.789 g/cm3.

Homework Answers

Answer #1

Weight of solute (ethylene glycol) = 7.8 g

molar mass of solute = 62g/mol

weight of solvent = volume x density = 93.4mL x 0.789g/mL = 73.6926g

molality of solution = no. of moles (solute)/W(solvent in Kg)

= (7.80x 1000) / (62x 73.6926) = 1.7071 m

Elevation in boiling point Delta Tb = Kb. molality

Kb of ethanol = 1.19K/Kgmol and boiling point is 78.4C

Delta Tb = 1.19x 1.7071 = 2.03144

Hence boiling point of the solution = 78.4 + 2.03 = 80.431 oC

Kf of ethanol = -1.99 and frezzing point is -114.6C

delta Kf (depression in freezing point = Kf x m

= -1.99 x 1.7071 = - 3.3972

Thus freezing point of the solution is -114.6 +(-3.3972) = -117.9972oC

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Calculate the freezing point and boiling point of a solution containing 8.50 g of ethylene glycol...
Calculate the freezing point and boiling point of a solution containing 8.50 g of ethylene glycol (C2H6O2) in 90.6 mL of ethanol. Ethanol has a density of 0.789 g/cm3. Calculate the freezing point of the solution. Calculate the boiling point of the solution.
An ethylene glycol solution contains 23.2 g of ethylene glycol (C2H6O2) in 98.6 mL of water....
An ethylene glycol solution contains 23.2 g of ethylene glycol (C2H6O2) in 98.6 mL of water. (Assume a density of 1.00 g/mL for water.) Determine freezing point and boiling point
An ethylene glycol solution contains 24.0 g of ethylene glycol (C2H6O2) in 89.4 mL of water....
An ethylene glycol solution contains 24.0 g of ethylene glycol (C2H6O2) in 89.4 mL of water. (Assume a density of 1.00 g/mL for water.) Determine the freezing point of the solution. Determine the boiling point of the solution
An ethylene glycol solution contains 24.6 g of ethylene glycol (C2H6O2) in 96.6 mL of water....
An ethylene glycol solution contains 24.6 g of ethylene glycol (C2H6O2) in 96.6 mL of water. (Assume a density of 1.00 g/mL for water.) Part ADetermine the freezing point of the solution. Part B Determine the boiling point of the solution.
Calculate the freezing point and boiling point of a solution containing 16.4 g of naphthalene (C10H8)...
Calculate the freezing point and boiling point of a solution containing 16.4 g of naphthalene (C10H8) in 115.0 mL of benzene. Benzene has a density of 0.877g/cm3. What is the freezing point and the boiling point of the solution?
Calculate the freezing point and boiling point of a solution containing 16.0 g of naphthalene (C10H8)...
Calculate the freezing point and boiling point of a solution containing 16.0 g of naphthalene (C10H8) in 109.0 mL of benzene. Benzene has a density of 0.877 g/cm3. Part A Calculate the freezing point of a solution. (Kf(benzene)=5.12∘C/m.)
Calculate the freezing point and boiling point of a solution containing 13.6 g of naphthalene (C10H8)...
Calculate the freezing point and boiling point of a solution containing 13.6 g of naphthalene (C10H8) in 110.0 mL of benzene. Benzene has a density of 0.877 g/cm3. A)Calculate the freezing point of a solution. (Kf(benzene)=5.12∘C/m.) B)Calculate the boiling point of a solution. (Kb(benzene)=2.53∘C/m.)
An ethylene glycol solution contains 24.4 g of ethylene glycol (C2H6O2) in 91.8 mL of water....
An ethylene glycol solution contains 24.4 g of ethylene glycol (C2H6O2) in 91.8 mL of water. (Assume a density of 1.00 g/mL for water.) Determine the boiling point of the solution. Express you answer in degrees Celsius.
1. Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. Calculate the freezing point and boiling point...
1. Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. Calculate the freezing point and boiling point of a solution containing 323 g of ethylene glycol and 1025 g of water. (Kb and Kf for water are 0.52°C/m and 1.86°C/m, respectively.) freezing point ___  °C boiling point ___°C 2. Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by dissolving 10.0 g of naphthalene in exactly 200 g of benzene has a freezing point 2.0°C below...
Calculate the freezing point and boiling point of a solution containing 18.4 g of naphthalene (C10H8)...
Calculate the freezing point and boiling point of a solution containing 18.4 g of naphthalene (C10H8) in 114.0 mL of benzene. Benzene has a density of 0.877 g/cm3. (Kf(benzene)=5.12∘C/m.) (Kb(benzene)=2.53∘C/m.)
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT