Jeopardy

1
Jeopardy
Soln Process
Satd solns
Concentration
Colligative Pr
Colloids
Q 100
Q 100
Q 100
Q 100
Q 100
Q 200
Q 200
Q 200
Q 200
Q 200
Q 300
Q 300
Q 300
Q 300
Q 300
Q 400
Q 400
Q 400
Q 400
Q 400
Q 500
Q 500
Q 500
Q 500
Q 500
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 gt C gt 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 MnSO4H2O In water at 20oC, saturated,
super-sat Or unsaturated?
21
500 Answer from H2
B gt A gt C
22
100 Question from H3
The following equation refers to Which law? Sg
kPg
23
100 Answer from H3
Henrys law
24
200 Question from H3

• In Raolts 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 gt A gt B
40
500 Question from H4

• List the following aqueous solutions
• In order of decreasing Fp.
• 0.040 m glycerin (C3H8O3)
• (b) 0.020 m KBr
• (c ) 0.030 m phenol (C6H5OH)

41
500 Answer from H4
B gt A gt 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)