Mixtures and Solutions - Colligative Properties

Question 1

colligative properties and solutions

Answer 1

• depend only on the number of dissolved particles

- NaCl and CaCl2 (2 particles and 3 particles, same concentration)

Question 2

vapor pressure of a solution

Answer 2

• lower than that of the pure solvent

- fewer solvent molecules can escape from surface

Question 3

boiling point elevation of a solution

Answer 3

• more energy is required to reestablish the vapor pressure of the solution with that of atmospheric pressure
• NaCl vs. CaCl2

Question 4

freezing point depression of a solution

Answer 4

• solute particles prevent solvent particles from interacting as temperature is lowered
• NaCl vs. CaCl2

Question 5

osmotic pressure of solutions

Answer 5

• osmosis is the flow of solvent molecules from an area of low concentration to an area of high concentration that have been separated with a semi-permeable membrane

Question 6

colligate properties depend only on the ______ dissolved particles

Answer 6

• a. number of

Question 7

the vapor pressure of a solution is ______ the pure solvent

Answer 7

• lower than