An automobile mechanic mixes ethylene glycol with water to make a solution of au

Question

An automobile mechanic mixes ethylene glycol with water to make a solution of automobile antifreeze. This mixture contains 1104 g of ethylene glycol and 1.50 kg of pure water. What is the freezing point of this solution in degrees Celsius? (Assume 1 atm pressure.) A zoologist combines NaCI with pure water for use in an outdoor aquatic facility. She makes the salt/water mixture by dissolving 15.0 kg of NaCI and 400.0 kg of pure water. What is the freezing point of this solution in degrees Celsius? (Assume 1 atm pressure.)

Explanation / Answer

Q2.

m = 1104 g of E.G.

m = 1.5 kg water

find freezing point..

For a mix, use colligative properties

Kf = -1.86 for water

so..

dTfmix = -Kf*m

m = molality = mol of solute / kg solvent

mol of solute = mass/MW = 1104/62.07 = 17.7863

m = 17.7863/1.5

dTf mix= -1.86*11.857 = -22.054 °C

For further questions, please follow Chegg's Guidelines. Post multiple questions in multiple set of Q&A. We are only allowed to anwser to only one question per set.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.