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- 1. Multiple Choice
Which would NOT increase the rate at which a sugar cube dissolves?
Reducing the amount of solvent
Crushing the sugar cube
Stirring the solution
Heating the solvent
- 2. Multiple Choice
You can make a solute dissolve more quickly in a solvent by
adding more solute.
adding ice.
heating the solvent.
removing some solvent.
- 3. Multiple Choice
A solution that contains all of the solute it can hold at a given temperature is
diluted.
saturated.
supersaturated.
unsaturated.
- 4. Multiple Choice
The amount of solute that can be dissolved in a specific amount of solvent at a given temperature is its
concentration.
density.
dilution.
solubility.
- 5. Multiple Choice
Three 10 g samples of sugar are represented below.
Sample A dissolves in water more slowly than sample B.
Sample B dissolves more slowly than sample C.
Which of the following best explains why sample A dissolves more slowly than the other two?
It has the most volume.
It has the smallest surface area.
It has the largest number of sugar molecules.
It has the fewest bonds between sugar modules.
- 6. Multiple Choice
A technican prepared a solution by heating 100 mL of distilled water while adding KCl crystals until no more KCl would dissolve. She then capped the clear solution and set it aside on the lab counter. After several hours she noticed the solution had become cloudly and some solid had settled to the bottom of the flask. Which statement best describes what happened?
As the solution cooled, evaporation of water increased the KCl concentration beyond its solubility.
Water molecules, trapped with the KCl crystals, were released after heating.
At lower temperatures the solubility of KCl decreased and recrystallization occurred.
At increased temperatures the solubility of KCl increased and remained too high after cooling.
- 7. Multiple Choice
A student pours mineral salts into a bottle of cold water. Which of the following best explains why shaking the bottle will affect the dissolving rate of the salt?
Shaking exposes the salts to the solvent more quickly.
Shaking helps more water evaporate.
Shaking equalizes the water temperature.
Shaking causes more ions to precipitate out of solution.
- 8. Multiple Choice
Students in Ms. Alvarez’s science class are investigating how temperature, in degrees Celsius (C), affects the solubility of a compound in 100 milliliters (mL) of water. Ms. Alvarez provides the students with a graph that shows the solubility of a certain compound, as shown below.
She then tell the students that she will demonstrate how many grams (g) of the compound will dissolve in 100 mL of water at 40 C. Based on the information in the graph, which of the following is the best prediction of how many grams of the compound will dissolve at 40 C?
40 g
65 g
85 g
100 g
- 9. Multiple Choice
The solubility graph below shows the amounts of four substances that will dissolve in 100 grams of water at various water temperatures.
Which substance has 80 grams of solute dissolved in 100 grams of water at 50 C?
Potassium Bromide
Ammonium Chloride
Potassium Chloride
Lithium Hydroxide
- 10. Multiple Choice
A solution that is able to dissolve additional solute is best described as
supersaturated.
concentrated.
saturated
unsaturated.
- 11. Multiple Choice
At a given temperature, the solubility of a gas in a liquid is:
proportional to the square root of the pressure of the gas above the liquid.
directly proportional to the pressure of the gas above the liquid.
inversely proportional to the pressure of the gas above the liquid.
unrelated to the pressure of the gas above the liquid.
- 12. Multiple Choice
The solubility of potassium chloride is 27.6g/100mL H2O. What would happen to it's solubility if the volume changes to 200mL
The solubility will remain the same.
The solubility will increase.
The solubility will decrease.
The solubility can only increase if you increase the amount of potassium chloride and not it's volume.
- 13. Multiple Choice
How does temperature affect the rate of solution formation?
It causes more collisions to happen.
It causes more collisions to happen and the collision are of higher energy.
It increases kinetic energy only.
Temperature does not affect solution formation as much as agitation or particle size.
- 14. Multiple Choice
The solubility of sodium nitrate is 74g/100mL H2O. What kind of solution would you have if you fully dissolved 60 g of sodium nitrate in 50mL water?
unsaturated
saturated
super saturated
cannot be determined because the solubility is not the same.
- 15. Multiple Choice
Which units are used to describe solubility?
g/mole
g/L
g/mL
mL/mole
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