1. Jeopardy Colloids Q $100 Q $100 Q $100 Q $100 Q $100 Q $200 Q $200
Soln Process
Sat’d solns
Concentration
Colligative Pr
Colloids
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Final Jeopardy

2. $100 Question from H1 What is the principle type of
Solute-solvent interaction for:
KBr in water?

3. $100 Answer from H1
Ion-dipole

4. $200 Question from H1 When ammonium chloride
Dissolves in water, the solution
Becomes colder. Is the solution
Process exothermic or endothermic?

5. $200 Answer from H1
endothermic

6. $300 Question from H1 The enthalpy of solution of KBr
In water is +198 kJ/mol.
Nevertheless, the solubility of KBr
Is relatively high. Why?

7. $300 Answer from H1
Entropy

8. $400 Question from H1 Indicate the type of solute-solvent
Interaction for methanol in water

9. $400 Answer from H1 Hydrogen bonding or
You could have said dipole-dipole

10. $500 Question from H1 Rank the solutions from weakest
To strongest solute-solvent
Interactions
KCl in water
(b) CH2Cl2 in benzene
(c) HCl in acetonitrile

11. $500 Answer from H1
A > C > B

12. $100 Question from H2 Water and glycerol CH2(OH)CH(OH)CH2(OH)
are miscible in all proportions. What does this
Mean? Explain why?

13. $100 Answer from H2 They mix in all proportions without
Forming a precipitate.
Reason is due to hydrogen bonding
Or strong dipole-dipole interactions

14. $200 Question from H2 Would you expect steric acid
CH3(CH2)16COOH to be more soluble
In water or in carbon tetrachloride?

15. $200 Answer from H2 Carbon tetrachloride Reason is due to weak dipole-
Weak dipole interactions

16. $300 Question from H2 Would you expect alanine (an amino
Acid) to be more soluble in water
Or in hexane?

17. $300 Answer from H2
water

18. $400 Question from H2 Common laboratory solvents include
Acetone (CH3COCH3), methanol
CH3OH, toluene (C6H5CH3) and
Water. Which of these is the best
Solvent for non-polar solutes.

19. $400 Answer from H2
toluene

20. $500 Question from H2 The solubility of MnSO4 * H2O
In water at 20oC is 70 g per 100 mL
Of water.
Is 1.22 M solution of MnSO4*H2O
In water at 20oC, saturated, super-sat
Or unsaturated?

21. $500 Answer from H2
B > A > C

22. $100 Question from H3 The following equation refers to Which law?
Sg = kPg

23. $100 Answer from H3
Henry’s law

24. $200 Question from H3 In Raolt’s law, the Xa refers to:
Mol fraction of solute
(b) Mol fraction of solvent

25. $200 Answer from H3 B

26. $300 Question from H3 Molalilty is defined by: Liters of solution
(b) Kilograms of solvent
(c ) grams of solvent

27. $300 Answer from H3 B

28. $400 Question from H3 A freezing point depression can
Be calculated using
Molality
(b) Molarity
(c ) grams per liter

29. $400 Answer from H3 A

30. $500 Question from H3 Which of the following pair is more
Likely to be soluble in hexane C6H14?
Benzene C6H6
(b) Glycerol CH(OH)CH(OH)CH2OH

31. $500 Answer from H3
A: Benzene

32. $100 Question from H4 How does increasing the
Concentration of a non-volatile
Solute in water affect the following
Properties?
Vapor pressure
(b) Freezing point

33. $100 Answer from H4
Decreases
(b) Depresses freezing point

34. $200 Question from H4 Consider two solutions, one formed
By adding 10 g of glucose (C6H12O6)
To 1 L of water and the other formed
By adding 10 g of sucrose (C12H22O11)
To 1 L water. Are the vapor pressures
Over the two solutions the same?

35. $200 Answer from H4 No. Would have a different mol
Value and therefore a different
Molality affecting Fp and Bp.

36. $300 Question from H4 Why does a 0.10 m aqueous solution
Of NaCl have a higher boiling point
Than a 0.10 m aqueous solution of
C6H12O6?

37. $300 Answer from H4
NaCl actually has 2 moles of ions
Per mole of NaCl

38. $400 Question from H4 Arrange the following aqueous
Solutions, each with 10% by mass of
Solute, in order of increasing Bp.
Glucose
(b) Sucrose
(c ) sodium nitrate

39. $400 Answer from H4
C > A > B

40. $500 Question from H4 List the following aqueous solutions
In order of decreasing Fp.
0.040 m glycerin (C3H8O3)
(b) m KBr
(c ) m phenol (C6H5OH)

41. $500 Answer from H4
B > A > C

42. $100 Question from H5 This phenomenon creates shafts of
Light in rain forests and in certain
Heterogeneous mixtures.

43. $100 Answer from H5
The Tyndall effect

44. $200 Question from H5 Which of the following is not a Colloid? Smoke
(b) Fog
( c) Kool-Aid drink

45. $200 Answer from H5 C

46. $300 Question from H5 Butter is an example of what type Of colloid?
Foam
(b) Solid foam
(c ) solid emulsion
(d) aerosol

47. $300 Answer from H5
Solid emulsion

48. $400 Question from H5
Name the two type of colloidal
Suspensions.

49. $400 Answer from H5
Hydrophilic and hydrophobic

50. $500 Question from H5 If absorption means to pass into
The interior, adsorption means to___

51. $500 Answer from H5
Adhere to the surface

52. Final Jeopardy This author wrote, “If one man kills another,
it murder, but if a hundred thousand men kill
another hundred thousand, it is considered an
act of glory!?”

53. Final Jeopardy Answer
Who is Tolstoy?
(The book is
Kingdom of God)