Jeopardy
Soln Process Sat’d solns
Concentration Colligative Pr Colloids
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Final Jeopardy
$100 Question from H1
What is the principle type of
Solute-solvent interaction for:
KBr in water?
$100 Answer from H1
Ion-dipole
$200 Question from H1
When ammonium chloride
Dissolves in water, the solution
Becomes colder. Is the solution
Process exothermic or endothermic?
$200 Answer from H1
endothermic
$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?
$300 Answer from H1
Entropy
$400 Question from H1
Indicate the type of solute-solvent
Interaction for methanol in water
$400 Answer from H1
Hydrogen bonding or
You could have said dipole-dipole
$500 Question from H1
Rank the solutions from weakest
To strongest solute-solvent
Interactions
(a)KCl in water
(b) CH2Cl2 in benzene
(c) HCl in acetonitrile
$500 Answer from H1
A>C>B
$100 Question from H2
Water and glycerol CH2(OH)CH(OH)CH2(OH)
are miscible in all proportions. What does this
Mean? Explain why?
$100 Answer from H2
They mix in all proportions without
Forming a precipitate.
Reason is due to hydrogen bonding
Or strong dipole-dipole interactions
$200 Question from H2
Would you expect steric acid
CH3(CH2)16COOH to be more soluble
In water or in carbon tetrachloride?
$200 Answer from H2
Carbon tetrachloride
Reason is due to weak dipoleWeak dipole interactions
$300 Question from H2
Would you expect alanine (an amino
Acid) to be more soluble in water
Or in hexane?
$300 Answer from H2
water
$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.
$400 Answer from H2
toluene
$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?
$500 Answer from H2
B >A> C
$100 Question from H3
The following equation refers to
Which law?
Sg = kPg
$100 Answer from H3
Henry’s law
$200 Question from H3
In Raolt’s law, the Xa refers to:
(a)Mol fraction of solute
(b) Mol fraction of solvent
$200 Answer from H3
B
$300 Question from H3
Molalilty is defined by:
(a)Liters of solution
(b) Kilograms of solvent
(c ) grams of solvent
$300 Answer from H3
B
$400 Question from H3
A freezing point depression can
Be calculated using
(a)Molality
(b) Molarity
(c ) grams per liter
$400 Answer from H3
A
$500 Question from H3
Which of the following pair is more
Likely to be soluble in hexane C6H14?
(a)Benzene C6H6
(b) Glycerol CH(OH)CH(OH)CH2OH
$500 Answer from H3
A: Benzene
$100 Question from H4
How does increasing the
Concentration of a non-volatile
Solute in water affect the following
Properties?
(a)Vapor pressure
(b) Freezing point
$100 Answer from H4
(a) Decreases
(b) Depresses freezing point
$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?
$200 Answer from H4
No. Would have a different mol
Value and therefore a different
Molality affecting Fp and Bp.
$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?
$300 Answer from H4
NaCl actually has 2 moles of ions
Per mole of NaCl
$400 Question from H4
Arrange the following aqueous
Solutions, each with 10% by mass of
Solute, in order of increasing Bp.
(a)Glucose
(b) Sucrose
(c ) sodium nitrate
$400 Answer from H4
C >A> B
$500 Question from H4
List the following aqueous solutions
In order of decreasing Fp.
(a)0.040 m glycerin (C3H8O3)
(b) 0.020 m KBr
(c ) 0.030 m phenol (C6H5OH)
$500 Answer from H4
B >A> C
$100 Question from H5
This phenomenon creates shafts of
Light in rain forests and in certain
Heterogeneous mixtures.
$100 Answer from H5
The Tyndall effect
$200 Question from H5
Which of the following is not a
Colloid?
(a)Smoke
(b) Fog
( c) Kool-Aid drink
$200 Answer from H5
C
$300 Question from H5
Butter is an example of what type
Of colloid?
(a)Foam
(b) Solid foam
(c ) solid emulsion
(d) aerosol
$300 Answer from H5
Solid emulsion
$400 Question from H5
Name the two type of colloidal
Suspensions.
$400 Answer from H5
Hydrophilic and hydrophobic
$500 Question from H5
If absorption means to pass into
The interior, adsorption means to___
$500 Answer from H5
Adhere to the surface
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!?”
Final Jeopardy Answer
Who is Tolstoy?
(The book is
Kingdom of God)