10) Which of the following represents the correct ranking in terms of increasing boiling point? A) n-butane < 1-butanol < diethyl ether <2-butanone B) n-butane < 2-butanone

If l-mol samples of urea, a nonelectrolyte, sodium chloride, and calcium chloride are each dissolved in equal volumes of water in separate containers: a Which solution would have the highest boiling point? b Which solution would have the highest freezing point?

It is possible to balance a paper clip on the surface of water in a beaker. lf you add a bit of soap to the water, however, the paper clip sinks. Explain how the paper clip can float and why it sinks when soap is added.

How can we complete questions 2-4 with the molecule?

hat is the vapor pressure of ethyl alcohol at 45 C? 100

9.) Limonene (136.24 g/mol) is one of the compounds that are found in rinds of citrus fruits and it can be extracted via steam distillation. How much steam is required to extract 150 grams of limonene if it is distilled at a temperature of 85ºC? The vapor pressure of water at 85ºC is 433.6 Torr. A. 26.4 g B. 1506 g C. 733 g D. 96.9 g

Please don't provide handwritten solution .....

Problem Solving: 1. A solution is made of 2.00 g of sucrose, C12H22011, in water, H20. The molar mass (MM) of sucrose is 342 g/mol. Calculate the (a) boiling point and (h) freezing point of the solution. (Hint: See Table 1 for given constants.) 2. A certain nonvolatile hydrocarbon that weighed 1.00 g was dissolved in 50.00 g of benzene. The resulting solution was boiled at 0.285 °C higher than the boiling point of pure benzene which boils at 80.1°C. Find the molar mass of the hydrocarbon. (Hint: See Table 1 for given constant.) 14

1.) Are there any intermolecular forces (IMF’s) between water molecules and cyclohexane molecules? What kind(s)? Given this, what would the magnitude and sign of DHMIXING be for cyclohexane dissolving in water?   a) Are there any IMF’s between water molecules and other water molecules? What kind(s)? Given this, what would the magnitude and sign of DHSOLVENT be for cyclohexane dissolving in water?   c) Are there any IMF’s between cyclohexane molecules and other cyclohexane molecules? What kind(s)? Given this, what would the magnitude and sign of DHSOLUTE  be for cyclohexane dissolving in water?   d) Why do you think cyclohexane does not dissolve in water? Analyze this the way it was done in class, thinking about the three contributions to DHSOLUTION. What do you think the magnitude and sign of DHSOLUTION would be for dissolving cyclohexane in water?  (Explain.)  Would you expect these substances to dissolve in each other? Why?

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