A-5.0% w/v NaCl saltwater solution

B-Pure water

Which of the above will evaporate the fastest?

a. A

b. B

c. they will evaporate at the same rate d. can only be determined experimentally

10. You have an unsaturated sugar-water solution. To get more sugar to dissolve, you could

a. cool the solution b. change the size of the container c. use larger sized sugar crystals d. add more sugar

17. Table sugar does not ionize when dissolved in water. You make a 0.5 M sugar solution with pure water, this solution will

a. not conduct electricity b. conduct electricity c. exhibit a Tyndall effect d. have a boiling point lower than water e. have a vapor pressure higher than water

18. Solution A: 5% (w/v) NaCl

Solution B: 2% (w/v) NaCl

Solution C: pure water

Which of the above aqueous solutions (or pure water) would have the lowest freezing point?

a. solution A

b. solution B

c. C - pure water

d. Solution A and B have the same freezing point which is lower than C e. A, B and C all have the same freezing point

20. Osmosis and dialysis differ in

a. whether the solvent flows through the membrane or not b. the effects of temperature on determining the net flow c. the size and type of particle that can pass through the membrane d. more than one choice is correct