AP QUIZZES - AP TOPIC 17 Colligative Properties SET E • AP Quizzes - AP TOPIC 17 Colligative Properties SET E.

QUESTION 1. Which observations below can be attributed to colligative properties?

(i) A NaCl solution boils at a higher temperature than pure water
(ii) A NaCl solution freezes at a lower temperature than pure water
(iii) Pure water freezes at a higher temperature than pure methanol

(A) (i)
(B) (ii)
(C) (i) and (ii)
(D) (i), (ii) and (iii)
(E) (ii) and (iii)

QUESTION 2. The vapor pressure of a solution containing a non-volatile solute is directly proportional to which of the following?

(A) Molality of the solute
(B) Osmotic Pressure
(C) Molality of the solution
(D) Mole Fraction of the Solvent
(E) None of the above

QUESTION 3. What are the van't Hoff factors of the following compounds?

Barium nitrate, methanol, potassium phosphate, hydrochloric acid.

(A) 1, 1, 1, 1
(B) 1, 2, 3, 4
(C) 1, 2, 2, 2
(D) 3, 1, 3, 2
(E) 3, 1, 4, 2

QUESTION 4. Calculate the molality of a solution that contains 5.00 g of naphthalene, C10H8, in 100. mL of carbon tetrachloride? (The density of CCl4 is 1.58 g/mL)

(A) 0.050
(B) 0.247
(C) 0.0862
(D) 0.0247
(E) 0.025

QUESTION 5. Calculate the boiling point of a solution of 215.0 g of magnesium bromide dissolved in 800.0 g of water. (Molal boiling point constant for water = 0.5000oC/m)

(A) 373.0 K
(B) 377.8 K
(C) 273.0 K
(D) 368.2 K
(E) None of the Above 