1. The colligative properties of a solution are a function of the A. nature of t

Question

1. The colligative properties of a solution are a function of the

A. nature of the solvent

B. number of solvent particles

C. number of solute particles

D. nature of the solute

2. What is the value of the freezing point constant for the solvent 1,4-dichlorobenzene (MW=147.01 g/mol). The enthalpy of fusion at 326.28 K is 18.88 kJ/mol.

A. 1.86

B. 0.52

C. 0.60

D. 6.89

3. At 300 K, liquid A has a vapor pressure of 280 mmHg and liquid B has a vapor pressure of 170 mmHg. They form a nearly ideal solution. Calculate the entropy of mixing for a solution obtained by mixing 2 moles of A and 3 moles of B.

A. -8393.13

B. -27.977

C. 27.977

D. 0

4. Gold and Thallium form a single eutectic system, with Te=131C at Xtl=0.66. If you start with a melt containing 15 mol Au and 5 mol Ti, what is the maximum number of moles of pure gold that you could obtain by crystallization?

A. 15 mol

B. 5 mol

C. 12.4 mol

D. 2.6 mol

Explanation / Answer

Answer

1. Colligative properties of solutions are properties that depend upon the concentration of solute molecules or ions.

Correct option - C. number of solute particles

3. For ideal solution enthalpy of mixing is zero.

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