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- 1. Multiple ChoiceThe boiling point of a solution is ______ the boiling point of the pure solvent.higher thanthe same aslower thanhigher or lower than
- 2. Multiple ChoiceMolality is measured inmols per kgmols per Lmols per kJmols per mL
- 3. Multiple ChoiceWhich technique could increase or speed up the rate of dissolving?Allowing the mixture to settleStirring the mixtureAdding more powderAdding more water
- 4. Multiple Choice
How many grams of sodium nitrate, NaNO3, are soluble in 100 g of water at 10 ºC?80 grams100 grams40 grams10 grams - 5. Multiple ChoiceAt 40˚C, at what point is the solution saturated with KCl?20g30g40g50g
- 6. Multiple ChoiceThis solution would be consideredUnsaturatedSupersaturatedSaturatedUndefined
- 7. Multiple ChoiceThis graph represents a(n) ___ solutionsaturatedsupersaturatedunsaturatedundefined
- 8. Multiple ChoiceThe freezing point of a solution is ____ the freezing point of the pure solvent.the same aslower thanhigher thanno relation to
- 9. Multiple ChoiceWhat is the freezing point of a 1.5 m solution of sucrose in water? (Kf = 1.86°C/m)-2.8°C-1.2°C-0.81°C0.81°C
- 10. Multiple ChoiceColligative properties depend on the _________ of the solute but not the __________ of the solute.concentration; identityidentity; concentrationreactivity; naturenature; reactivity
- 11. Multiple ChoiceA solution has 10 moles of ammonia in 2L of solution. What is the molarity?5.0 M20 M0.5 M0.2 M
- 12. Multiple ChoiceHow many moles of HNO3 are needed to prepare 5L of a 2M solution?10 mol2.5 mol0.4 mol100 mol
- 13. Multiple ChoiceWhat is the boiling point of a solution if 5.76 mol NaF is dissolved in 3.62 kg of water? (Kb=0.512*C/m)0.81*C101.62*C100.81*C103.1*C
- 14. Multiple ChoiceWhat is the dissociation factor (i.e. van't Hoff factor) for the compound CH3OH?1369
- 15. Multiple ChoiceWhat is the dissociation factor (i.e. van't Hoff factor) for the compound Na2SO4?1357
- 16. Multiple Choice
When CH3OH is dissolved in water, how many particles are in solution?
1
3
4
5
6
- 17. Multiple Choice
When KCl (potassium chloride) is dissolved in water, how many particles are in solution?
1
2
3
4
6
- 18. Multiple Choice
When CaBr2 is dissolved in water, how many particles will be in solution?
1
2
3
4
5
- 19. Multiple Choice
When 11.0 g of CaCl2 dissolves in 45.0 g of water, what is the boiling point of the solution? (Kb = 0.512 oC/m)
3.4
103.4
101.1
1.1
101.4
- 20. Multiple Choice
Find the boiling point of a solution containing 15.0 g sucrose (molar mass = 342.3g/mol), in 100g of water. (Kb = 0.512 oC/m)
100.2
99.8
0.2
-0.2
- 21. Multiple Choice
Which salt below has the largest effect on freezing point?
C2H4O2
H2S
LiBr
CaF2
- 22. Multiple Choice
When 26.0 g of NaCl, are dissolved in 0.5 kg of water, what is the freezing point of this solution? (Kf = 1.86 oC/m)
-3.3
103.3
-1.7
-0.8
- 23. Multiple Choice
A solution contains 15.5 g of a nonelectrolyte and 200 g of water. The water freezes at -4.5° C and Kf = 1.86° C/m. What is the molar mass of the nonelectrolyte?
18g/mol
32g/mol
16g/mol
46g/mol
53g/mol
- 24. Multiple Choice
Using the graph above, which compound would dissolve the fastest at 20° C, KCl, NaCl, KNO3, or KClO3?
KCl
NaCl
KNO3
KClO3
- 25. Multiple Choice
A solution that has the maximum amount of solute dissolved in the solvent is called __________________.
saturated
supersaturated
unsaturated
suspension
- 26. Multiple Choice
How many grams of NaCl need to be dissolved in 50g of water to make a 0.2m solution?
1.8g
0.1g
1.6g
0.6g
- 27. Multiple Choice
A solution that has less than the maximum amount of solute dissolved in the solvent is called __________________.
saturated
supersaturated
unsaturated
suspension
- 28. Multiple Choice
How many grams of NaCl need to be dissolved in 50g of water to make a 0.2m solution?
1.8g
0.1g
1.6g
0.6g
- 29. Multiple Choice
Using the graph above, how many grams of KCl can be dissolved in 300g of water at 40° C?
30g
50g
120g
40g
- 30. Multiple Choice
A solution contains 25 g of a nonelectrolyte and 80 g of water. The water boils at 104.7° C and Kb = 0.512° C/m. What is the molar mass of the nononelectrolyte?
34g/mol
17g/mol
11g/mol
28g/mol
46g/mol
- 31. Multiple ChoiceWhat observation(s) reflect(s) colligative properties?
I. A 0.5 m NaBr soln has a higher vapor pressure than 0.5 m BaCl2 soln.
II. A 0.5 m NaOH soln freezes at a lower T. than pure water.
III. Pure water freezes at a higher T than pure methanol.only Ionly IIonly III1 & II - 32. Multiple ChoiceThe boiling point of a solution is ______ the boiling point of the pure solvent.higher thanthe same aslower thanhigher or lower than
- 33. Multiple ChoiceThe freezing point of a solution is ____ the freezing point of the pure solvent.the same aslower thanhigher thanno relation to
- 34. Multiple Choice
The vapor pressure of a pure solvent is ___________ that of a solution
more than
less than
equal to
- 35. Multiple Choice
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.
- 36. Multiple ChoiceColligative properties depend on the _____ of solute particles in solution.typenumberpHnature
- 37. Multiple Choice
What is the boiling point of a solution if 5.76 mol CO2 is dissolved in 3.62 kg of water? (Kb=0.512*C/m)
0.81*C
100.81*C
99.19*C
103.1*C
- 38. Multiple ChoiceWhat is the freezing point of a 1.5 m solution of sucrose in water? (Kf = 1.86°C/m)-2.8°C-1.2°C-0.81°C0.81°C
- 39. Multiple ChoiceWhat is the freezing point of a 1.5 m solution of sucrose in water? (Kf = 1.86°C/m)-2.8°C-1.2°C-0.81°C0.81°C
- 40. Multiple Choice
A solution made by dissolving 9.81 g of a nonvolatile nonelectrolyte in 90.0 g of water boiled at 100.37 oC. What is the approximate molar mass of the substance? Kb=0.51 oC/m
240 g/mol
150 g/mol
79 g/mol
61 g/mol
- 41. Multiple Choice
Which one of the following diagrams has the lowest vapor pressure?
1
2
3
4
5
- 42. Multiple Choice
142 g of sodium sulfate, Na2SO4, are dissolved in 875 g of H2O. (Assume 100% ionization)
What will be the freezing point of the resulting solution?
(Mr Na2SO4 = 142; Kf =1.86)
−4.3 oC
−4.5 oC
−3.8 oC
−6.4 oC
- 43. Multiple Choice
Which of the following is a colligative property
Lowering of vapor pressure
Relative lowering of vapor pressure
Both
None
- Answer choicesTagsAnswer choicesTags