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Topic 7: Solutions

23. Effect of solute on boiling and freezing points of water:
Determining which solute has the least or greatest effect

1. Which 1 M solution has the lowest freezing point? 3) C2H5OH (aq) 4) C12H22O12 (aq)
1) KCl (aq)

2) C6H12O6 (aq)

2. Which 1 M solution will produce the greatest increase in boiling point of water?
1) CH3OH (aq)
4) C6H12O6 (aq)
2) C2H4(OH)2(aq)
3) CuCl2 (aq)

3. Which 0.1 M solution has the highest boiling point?
1) NaCl (aq) 2) MgCl2 (aq) 3) LiCl (aq) 4) CsCl (aq)

4. Which solution containing 1 mole of solute dissolved in 500 grams of water has lowest freezing
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point? 2) NaNO3 3) NaCl 4) Na2SO4
1) NaOH

5. Which 1 M solution has the lowest boiling point? 3) Ca(OH)2 (aq) 4) C6H12O6 (aq)
1) KNO3 (aq)
2) K2SO4 (aq)

6. A 0.5 M aqueous solution of which substance will have the highest freezing point?
1) C2H5OH
3) KCl

4) KOH

2) CaSO4

24. Effect of concentration on boiling and freezing points of water:

Determining which concentration has the least or greatest effect
1. Which concentration of CH3OH solution has the lowest freezing point?
1) 0.0001 M 2) 0.001 M 3) 0.0002 M 4) 0.002 M

2. Which concentration of NaOH has the lowest freezing and highest boiling temperatures?
1) 2.0 M 2) 1.5 M 3) 1.0 M 4) 0.1 M

3. A LiNO3 solution of which concentration will boil at the lowest temperature? 4) .4 M
2) .2 M

3) .3 M

1) .1 M

4. A 1000 grams sample of water will have the highest boiling point when it contains
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1) 1 x 10 dissolved particles
3) 1 x 10 dissolved particles

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2) 1 x 10 dissolved particles 4) 1 x 10 dissolved particles

5. Which solution will freeze at the lowest temperature?
3) 2 moles of sugar in 500 g of water

1) 1 mole of sugar in 500 g of water
2) 1 mole of sugar in 1000 g of water 4) 2 moles of sugar in 1000 g of water

6. Of the following solutions, the one that will boil at the highest temperature contains 1 mole of NaCl
dissolved in
1) 250 g of H2O 3) 750 g of H2O
2) 500 g of H2O 4) 1000 g of H2O

7. Which sugar solution will freeze at the highest temperature?
1) 1 mole of sugar in 500 grams of water 3) 2 moles of sugar in 500 grams of water
2) 1 mole of sugar in 1000 grams of water 4) 2 moles of sugar in 1000 grams of water

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