AnswersChemistry A.1 - F26 - Jacob MetskerLab: Calorimetry and Specific Heat

Solutions and Solubility Answers

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1
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Which is the second step in the dissolving process?

A
The solute is mixed with the solvent.
B
The solute ions are carried into the solution.
C
The solvent molecules surround the solute particles.
D
The solvent molecules are attracted to solute particles or ions.
2
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The graph below shows how solubility changes with temperature.Which two solutions have similar solubilities at 40°C?

Question illustration
A
Na2SO4 and NaCl
B
Na2HAsO4 and NaCl
C
Na2HAsO4 and Na2SO4
D
Ba(NO3)2 and Ce2(SO4)3 • 9H2O
3

A 1-L soda bottle contains dissolved carbon dioxide gas. Which bottle would have the highest concentration of dissolved gas?

A
a bottle that is sealed
B
a bottle that was opened 1 minute ago
C
a bottle that was opened 1 hour ago
D
a bottle that was opened 1 day ago
4

Which method would increase the solubility of a gas?

A
increasing the pressure
B
stirring the solvent quickly
C
increasing the temperature
D
decreasing the amount of solvent
5

Under which conditions would the solubility of a gas be greatest?

A
high pressure and high temperature
B
high pressure and low temperature
C
low pressure and high temperature
D
low pressure and low temperature
6

The concentration of a solute in a solution is greater than the maximum concentration that is predicted from the solute's solubility. What is the best way to describe this solution?

A
diluted
B
saturated
C
unsaturated
D
supersaturated
7

Solute crystals are added to a solution until they begin to sink to the bottom of their container. The solution is then heated, and many more solute crystals dissolve. Which term best describes the solution immediately after it was heated?

A
saturated
B
unsaturated
C
concentrated
D
supersaturated
8

A student was comparing the solubility of equal amounts of table salt and table sugar at different temperatures.The table below shows the four samples that the student used and the temperature of the water that they were dissolved in.SampleNameChemical formulaTemperature of water (°C)1Table sugarC12H22O11 802Table sugarC12H22O11 453Table salt NaCl 554Table saltNaCl 63Which of the samples most likely had the highest solubility?

A
1
B
2
C
3
D
4
9

The graph below shows how solubility changes with temperature.What is the solubility of Na2HAsO4 at 60°C?

Question illustration
A
20 g/100 mL of water
B
46 g/100 mL of water
C
65 g/100 mL of water
D
70 g/100 mL of water
10

Which refers to the amount of a solute that will dissolve in a given volume of solvent at a given temperature and pressure?

A
solubility
B
supersaturated
C
dissolution rate
D
concentrated
11

Which is true about dissolving a polar substance in water?

A
The solvent particles are all nonpolar molecules.
B
The solute particles are carried into the solution.
C
The solute particles have no attraction for the solvent molecules.
D
The solute particles are very different from the solvent molecules.
12

Which is true about the dissolving process in water?

A
Nonpolar solutes dissolve easily in water.
B
Solute molecules surround water molecules.
C
Molecules or ions of a solute spread throughout the water molecules.
D
Water molecules are repelled by solute ions at the surface of the solute.
13

Under which conditions will sugar most likely dissolve fastest in a cup of water?

A
a sugar cube with stirring at 5°C
B
a sugar cube without stirring at 15°C
C
sugar crystals with stirring at 15°C
D
sugar crystals without stirring at 5°C

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