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WorksheetsSolutions Practice Test
Total questions: 60
Worksheet time: 5hrs 34mins
The molarity (M) of a solution is equal to the
number of grams of solute/liter of solvent
number of grams of solute/liter of solution
number of moles of solute/liter of solvent
number of moles of solute/liter of solution
none are correct
What is the concentration of 10.0 moles of copper (II) nitrate in 5.0 liters of solution?
(a)
If 0.025 gram of Pb(NO3)2 is dissolved in 100. grams of solution, what is the concentration of the resulting solution, in parts per million?
2.5 ×10-4 ppm
2.5 ppm
250 ppm
4.0 ×103 ppm
none are correct
How many total moles of KNO3 must be dissolved in water to make 1.5 liters of a 2.0 M solution?
(a)
What is the molarity of 1.5 liters of an aqueous solution that contains 52 grams of lithium fluoride, LiF, (gram-formula mass = 26 grams/mole)?
1.3 M
2.0 M
3.0 M
0.75 M
none are correct
Compared to pure water, a 10% NaCl solution would have a:
higher boiling point and higher freezing point
lower boiling point and lower freezing point
higher boiling point and lower freezing point
lower boiling point and higher freezing point
none are correct
When making Kool-Aid, the Kool-Aid powder would be the _________ and the water would be the ____________.
solute; solvent
solvent; solute
solution; solvent
solvent; solution
How many grams of KCl would have to be used to make 0.8 liters of a 3.0 M solution?
2.4 grams
229 grams
140 grams
179 grams
What is the concentration in ppm when 7.96 g of CH4 are dissolved in 1500 g of solution?
5305 ppm
6208 ppm
5600 ppm
4825 ppm
As the temperature of the water increases, the solubility of solids generally ___________.
increases
decreases
remains the same
As the temperature of the water increases, the solubility of gases generally ___________. This is why fish can die off in water that gets too hot.
increases
decreases
remains the same
What is the molarity of a solution that has 20 grams of NH4Cl dissolved in 350 mL of solution?
0.057 M
2.4 M
1.0 M
0.001 M
What is the concentration in ppm when 20 grams of NaCl are dissolved in 600 mL of water?
34,617 ppm
32,258 ppm
574 ppm
556 ppm
What is the molarity of a solution that was made with 6.3 moles of KBr in 900 mL of water?
0.007 M
0.14 M
7.0 M
1.4 M
What are two ways to speed up the rate of dissolving sugar in water?
Use cold water, and not stir the solution
Use cold water, and stir the solution
Use hot water, and stir the solution
Use hot water, and not stir the solution
What is the percent by mass of 5.0g of iron sulfate dissolved in 75.0 g of water?
80g
6.6%
6.25%
7.5%
A solution is formed by adding 35g of ammonium nitrate to 250g of water. What is the % mass of ammonium nitrate?
12%
13%
285%
30%
What is a solution that has the maximum amount of solute dissolved at a specific temperature and pressure it is considered to be?
Which concentration of sweet tea would you expect to taste the sweetest?
1 M
3 M
3.1 M
2.5 M
The solubility of gases tend to __________ when you increase temperature.
Increase
Decrease
Stays the same
Dissolve
At what temperature does the gas, SO2 , have the lowest solubility?
0oC
10oC
40oC
90oC
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250.0 mL?
15.9 M
0.636 M
0.642 M
1.59 M
Which of the following would help in being able to dissolve a greater amount of solid in a solution?
Lower the temperature.
Decrease the pressure of the solution.
Increase the pressure of the solution.
Heat the solution.
Which of the following would result in being able to dissolve a greater amount of gas in a solution?
Lower the temperature of the solution.
Decrease the pressure of the solution.
Stir the solution.
Heat the solution.
Which of the following statements is true?
An increase in temperature decreases the solubility of most solids, but increases the solubility of gases.
An increase in temperature increases the solubility of most solids and gases.
An increase in temperature decreases the solubility of most solids and gases.
An increase in temperature increases the solubility of most solids, but decreases the solubility of gases.
Which of the following would dissolve more of a solid?
Cool the solution.
Decrease the surface area of the solute.
Increase the polarity of the solution.
Break the solute into smaller particles.
Kool-Aid - Powder sugar, and water
Identify the solvent
You are given a small beaker of solution at room temp. You add a bit of solute to the solution and it dissolves. The solution was:
saturated
unsaturated
concentrated
warm
How do you know when you have a saturated solution?
You don't see anymore material in the solution. It has dissolved.
The material dissolves and no more will dissolve because you see it collect at the bottom.
The solution is bubbling and cloudy.
The solution is clear and there is nothing at the bottom.
Which of the following is the Dilution Formula?
V1M1 = V2M2
M = m/V
V = mT
PV = nRT
What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?
0.067 mL
60.0 mL
100 mL
125 mL
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250.0 mL?
15.9 M
0.636 M
0.642 M
1.59 M
If I have 340.0 mL of a 0.500 M NaBr solution, what will the concentration be if I add 560.0 mL more water to it? (Remember to use the total new volume)
.188 M
3.78 M
.389 M
1.76 M
If I dilute 250 mL of 0.10 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?
2 M
0.02 M
0.033 M
0.08 M
125.0 mL of 2.00 M calcium hydroxide solution is diluted to a concentration of 1.50 M. How many mL of water was added to the original volume?
167 mL
42.0 mL
93.8 mL
0.0240 mL
What is the final molarity of mixing these three solutions?
Solution 1: 200 mL of solution Molarity = 3.5.
Solution 2: 325 mL of solution ,Molarity = 1.67
Solution 3: 550 mL of water, Molarity = 6.7
Round your answer to 3 sig figs
(a)
Which salt below has the largest effect on freezing point?
C2H4O2
CO2
LiBr
CaF2
The freezing point of a solution is ___________ that of a pure solvent
more than
less than
equal to
Students make ice cream to investigate matter and its properties. The students add salt to the ice cream maker so that the mixture will change from a liquid to a solid. Which conclusion provides the most important reason salt is used to make ice cream solidify?
Solution A contains 0.1 mol of sucrose, dissolved in 500. g of water. Solution B contains 0.1 mol of sodium chloride, dissolved in 500. g of water. Which fo the following statements about theses solutions is true?
Both solutions have the same vapor pressure.
Solution A would boil at a higher temperature than solution B would.
Solution A would freeze at a higher temperature than solution B would.
Both solutions would boil at the same temperature.
Water boils at a lower temperature on Pike's Peak (on top of a mountain) than it does at sea level because
the atmospheric pressure is lower on Pike's Peak that it is at sea level.
the atmospheric pressure is higher on Pike's Peak that it is at sea level.
the heat source is not as hot at higher altitudes.
the heat source is hotter at higher altitudes, so water boils at lower temperatures.
The higher the number of solute particles in a solution,
the lower the vapor pressure
the lower the freezing point
the higher the boiling point
all of the above
