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Topic 7: Solutions

3. Solubility factors: Recalling definitions and facts

1. The solubility of a salt in a given volume of water depends largely on the
3) Rate at which the salt and water are stirred
1) Surface area of the salt crystals

2) Pressure on the surface of the water 4) Temperature of the water

2. Which change will have the least effect on the solubility of a solid?
1) Increase in temperature 3) Decrease in temperature
2) Increase in surface area 4) Decrease in pressure

3. A change in pressure has the greatest effect on the solubility of a solution that contains a
1) Solid in a liquid

3) Liquid in a liquid

2) Gas in a liquid 4) Liquid in a solid

4. Which change will increase the solubility of a gas in water?
1) Increase in pressure and increase in temperature
Teacher Preview Copy
2) Increase in pressure and decrease in temperature
3) Decrease in pressure and increase in temperature
4) Decrease in pressure and decrease in temperature

5. As temperature of water increases, the solubility of all gases
1) Decrease, and the solubility of a all solids increase
2) Increase, and the solubility of all solids decrease
3) Decrease, and the solubility of a all solids also decrease
4) Increase, and the solubility of all solids also increase

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4. Solubility Factors: Relating change in solubility to type of solute
1. As water temperature increases, the solubility of which substance will increase?
3) Oxygen

4) Carbon dioxide

2) Sodium chloride
1) Nitrogen Teacher Preview Copy
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2. Which substance increases its solubility in water when the water temperature is changed from 30 C
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to 50 C? 2) NH3 3) Cl2 4) CH4
1) NaNO3
3. As the temperature of water increases, the solubility of which substance will decrease?
1) SO2 2) CaCl2 3) NaCl 4) NH4Cl

4. A decrease in water temperature will increase the solubility of
1) C6H12O6(s) 2) NH3(g) 3) KCl (s) 4) Br2 (l)

5. As the pressure of a system is changed from 1 atm to 2 atm, the solubility of which substance will
be most affected by this change? 3) LiCl (s) 4) LiCl (l)
2) HCl(g)

1) HCl (l)
6. At standard pressure, water at which temperature will contain the most dissolved NH4Cl particles?
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1) 5 C 2) 10 C 3) 15 C 4) 20 C
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7. At which temperature would 100 g H2O(l) contain the most dissolved oxygen?
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1) 10 C 2) 20 C 3) 30 C 4) 40 C
8. At which temperature would water contain the least amount of dissolved CO(g) at 1 atm?
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1) 50 C 2) 60 C 3) 300 K 4) 350 K

9. Under which conditions would carbon dioxide be most soluble in water?
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1) 10 C and 1 atm 2) 10 C and 2 atm 3) 20 C and 1 atm 4) 20 C and 2 atm
10. Under which two conditions would water contain the least number of dissolved NH3 (g) molecules?
1) 101.3 KPa and 273 K 3) 60 KPa and 273 K
2) 101.3 kPa and 546 K
4) 60 KPa and 546 K

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