In an icy glass of lemonade, which of the following is the solvent?
a. lemon juice
b. ice
c. sugar
d. water
What is d - water
100
The concentration of a solution can be described in several ways. In which of these ways do you calculate the moles of a solute divided by the kilograms of solvent?
a. molality
b. molarity
c. mole fraction
d. mass percent
What is a - molality
100
A mixture is heated to boiling. The vapor is captured and passed across a condenser, and a more pure form of the original liquid is collected in another container. This process describes which of the following?
a. filtering
b. distillation
c. osmosis
d. chromatography
What is b - distillation
100
Water vapor in the earth's air is an example of a solution. What type of solution would this be?
a. gas in a gas
b. gas in a liquid
c. liquid in a liquid
d. liquid in a gas
What is a - gas in a gas
200
Liquid water in the earth's air is an example of a solution. What type of solution would this be?
a. solid in a gas
b. liquid in a gas
c. gas in a liquid
d. liquid in a liquid
What is b - liquid in a gas
200
Which of the following is the number of moles of a solute that is dissolved in 1 liter of solution?
a. molality
b. molarity
c. mass percent
d. mole fraction
What is b - molarity
200
The process of fractionation is based on which property of the components of a solution?
a. freezing points
b. concentrations
c. molarities
d. boiling points
What is d - boiling points
200
You want to determine the concentration of a solid solute dissolved in a specified volume of liquid solvent. Which of the following would be the best to use?
a. mole fraction
b. molarity
c. mass/mass percentage
d. volume/volume percentage
What is b - molarity
300
Some solutions cannot dissolve any more solute. What word is used to describe a solution of this type?
a. concentrated
b. unsaturated
c. weak
d. saturated
What is d - saturated
300
You want to determine the concentration of a liquid solute dissolved in a liquid solvent. Which of the following would be the best to use?
a. volume/volume percent
b. molarity
c. molality
d. mass/mass percent
What is a - volume/volume percent
300
Crude oil is separated into different substances such as gasoline, petroleum, diesel fuel, and propane by which process?
a. filtering
b. chromatography
c. osmosis
d. fractionation
What is d - fractionation
300
You have two liquids in solution. The solutions have different boiling points. Which of the following is the best method to separate them?
a. distillation
b. fractionation
c. filtration
d. osmosis
What is a - distillation
400
The random movement of molecules in a solvent causes which of the following in a cube of solid solute?
a. a supersaturated solution
b. a change in the chemical identity of a solute
c. a decrease in concentration of a solute
d. dissolution
What is d - dissolution
400
Which colligative property is employed when salt is put on an icy sidewalk to melt ice?
a. boiling-point elevation
b. freezing-point depression
c. vapor-pressure lowering
What is b - freezing-point depression
400
Professional and amateur athletes are often tested for the use of illegal performance-enhancing drugs. Which of the following processes is used to separate these chemicals from a blood or urine sample?
a. distillation
b. fractionation
c. osmosis
d. chromatography
What is d - chromatography
400
What date is all of your work for the three TCAP weeks due?
a. March 22nd
b. Never - I don't need to do any work to pass
What is a - March 22nd!
500
What are the units of molarity?
a. moles of solute/moles of solution
b. moles of component/total moles of solution
c. moles of solute/liters of solution
d. moles of solute/kilograms of solvent
What is c - moles of solute/liters of solution
500
You have a pot of pasta boiling in water on the stove. Which method will you use to separate the mixture of pasta and water?
a. distillation
b. fractionation
c. osmosis
d. filtration
What is d - filtration
500
Which of the following involves separating a solution by liquids moving across a selectively permeable membrane?
a. chromatography
b. fractionation
c. distillation
d. osmosis
What is d - osmosis
500
How can I get in touch with Ms. Clark while she is out of the office TCAP proctoring?
a. Phone
b. K-mail
c. Paper airplane message
What is b - K-mail. I will not be able to return phone calls until after March 22nd unless you send me a k-mail and ask me to call you.