Test

Question 1

Suppose that you have 1.0 kg of water to which you add 0.5 mol sucrose. How will the freezing point of the water change?

Revolt · Accepted Answer

It will decrease.

Question 2

What is the change in freezing point?

Revolt · Accepted Answer

18.9°C

Question 3

Suppose that you have 1.0 kg of water. How will the boiling point of the water change if you add 2.0 mol of sucrose?

Revolt · Accepted Answer

It will increase.

Question 4

The new boiling point is 101.02°C. Suppose that you add another 2.0 mol of sucrose to this solution. What do you predict the new boiling point will be?

Revolt · Accepted Answer

102.04°C

Question 5

Which equation should you use?

Revolt · Accepted Answer

ΔTf = Kfm

Question 6

Complete this example: A 0.67 molal solution was made by dissolving glucose in water. The boiling point of pure water is 100.00°C. The boiling point constant for water is 0.51°C·kg/mol.Set up the problem. T = (0.51C•kg/mole)(0.67 m) What is the T value? C

Revolt · Accepted Answer

0.34

Question 7

Which equation should you use?

Revolt · Accepted Answer

ΔTb = Kbm

Question 8

Which equation should you use?

Revolt · Accepted Answer

ΔTf = Kfm

Question 9

Suppose you have a 0.15 m glucose solution in water. How will the osmotic pressure of this solution change if you add water?

Revolt · Accepted Answer

It will decrease.

Question 10

How does the vapor pressure of ethanol compare to the vapor pressure of a solution of phenol in ethanol?

Revolt · Accepted Answer

The vapor pressure of ethanol is higher.

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