1. Jeopardy Nuclear and Biochem. Acid/Base Thermo. Kinetics Equilibrium
Final Jeopardy

2. $100 Question from Acid/Base
Which substance acts as the base in the reaction:
NH3 (aq) + HNO3 (aq) <==>NH4+ (aq) + NO3- (aq)?
A NH3
B HNO3
C NH4
D NO3

3. $100 Answer from Acid/Base
A. NH3

4. $200 Question from Acid/Base
The label on a bottle indicates that the
substance inside has a pH of 2.
This tells you that the substance is:
neutral.
strongly acidic.
mildly basic.
strongly basic.

5. $200 Answer from Acid/Base
B. strongly acidic.

6. $300 Question from Acid/Base
The equation below shows how an unknown
compound dissociates when dissolved in water.
CH  H+ + C-
If this compound is 99.9% dissociated in
solution, how would it be classified?
As a strong base
As a strong acid
As a weak base
As a weak acid

7. $300 Answer from Acid/Base
B. As a strong acid

8. $400 Question from Acid/Base
Mr. Lance plans to demonstrate a reaction between
a weak acid and a strong base in his class. Which
acid and base could he use to demonstrate this
reaction?
CH3COOH and NaOH
H2SO4 and NaOH
CH3COOH and NH4OH
H2SO4 and NH4OH

9. $400 Answer from Acid/Base
CH3COOH and NaOH

10. $500 Question from Acid/Base
The percentages of dissociation of four acids
are listed below.
Acid P is 0.60% dissociated.
Acid Q is 4.15% dissociated.
Acid R is 12.55% dissociated.
Acid S is 71.55% dissociated.
Which comparison of the strengths of the acids is correct?
Q is a stronger acid than R.
R is a stronger acid than S.
R is a weaker acid than Q.
P is a weaker acid than Q.

11. $500 Answer from Acid/Base
D. P is a weaker acid than Q.

12. $100 Question from Thermo.
Which statement correctly describes the change in
molecular motion as water undergoes a change of
phase?
A. Molecular motion decrease as liquid water
becomes ice.
B. Molecular motion stays the same as liquid water
becomes water vapor.
C. Molecular motion decreases as liquid water
D. Molecular motion decreases as ice becomes liquid
water.

13. $100 Answer from Thermo. A. Molecular motion decrease as liquid water
becomes ice.

14. $200 Question from Thermo.
Which graph represents a chemical reaction that
releases energy?

15. $200 Answer from Thermo. D.

16. $300 Question from Thermo. How is the energy of molecules of ice at
0 oC different from the energy of liquid
water molecules at 0 oC?
A. Water molecules of ice have less kinetic energy
B. Water molecules of ice have more kinetic
energy
C. Water molecules of ice have less potential
D. Water molecules of ice have more potential

17. $300 Answer from Thermo. A. Water molecules of ice have less kinetic
energy

18. $400 Question from Thermo.
Which statement is a correct interpretation of the graph?
Solid and liquid are present during interval A.
No heat is absorbed during interval B.
The latent heat of fusion accounts for the energy absorbed
during interval C.
D. Both liquid and gas are present during interval D.

19. $400 Answer from Thermo.
D. Both liquid and gas are present during interval D.

20. $500 Question from Thermo.
What is the total heat required to raise the temperature of
500 g of water from 25 oC to 100 oC?
(The specific heat of water is 4.18 J/oC/g.)
8,360 J
13,933 J
156,750 J
261,250 J

21. $500 Answer from Thermo.
C. 156,750 J

22. $100 Question from Kinetics
Which potential energy diagram BEST shows how
a catalyst affects a chemical reaction?

23. $100 Answer from Kinetics A.

24. $200 Question from Kinetics
Under normal conditions, hydrogen peroxide decomposes
very slowly to produce oxygen and water. In the presence of
manganese dioxide, the reaction proceeds at a much greater
rate. The manganese dioxide can be recovered and used to
speed the decomposition of still more hydrogen peroxide.
How does manganese dioxide increase the rate of this
reaction?
by increasing the entropy change of the reaction
by making the reaction exothermic instead of endothermic
by providing a different route with a lower activation
energy
D. by increasing the energy difference between products
and reactants

25. $200 Answer from Kinetics C. by providing a different route with a
lower activation energy

26. $300 Question from Kinetics
The equation below shows the combustion of methane
(CH4) to produce carbon dioxide (CO2) and water (H2O).
How does the rate at which H2O is produced compare with
the rate at which CH4 is consumed?
H2O is produced half as fast as CH4 is consumed.
H2O is produced equally as fast as CH4 is consumed
H2O is produced twice as fast as CH4 is consumed.
H2O is produced four times as fast as CH4 is consumed.

27. $300 Answer from Kinetics C. H2O is produced twice as fast as CH4 is
consumed.

28. $400 Question from Kinetics
The equation for the production of sulfur trioxide (SO3) from
sulfur dioxide (SO2) and oxygen (O2) is shown below.
Why does decreasing the pressure on the reacting gases
decrease the rate of this reaction?
Molecules collide with less kinetic energy.
The number of collisions between molecules decreases.
Collisions between molecules occur at different angles.
The molecules slow down and have more time to react
when they collide.

29. $400 Answer from Kinetics
B. The number of collisions between molecules decreases.

30. $500 Question from Kinetics
What are two reasons that an decrease in temperature causes
an decrease in reaction rate?
Activation energy decreases and concentration decreases.
Concentration decreases and the number of collisions
decreases.
C. Kinetic energy of molecules decreases and activation
energy decreases.
D. The number of collisions decreases and kinetic energy of
molecules decreases.

31. $500 Answer from Kinetics
D. The number of collisions decreases and kinetic energy of
molecules decreases.

32. $100 Question from Equilibrium
When a chemical reaction and its reverse are occurring at the
same time and at the same rate, the reaction has achieved
Displacement
Equilibrium
Imbalance
Decomposition.

33. $100 Answer from Equilibrium
B. Equilibrium

34. $200 Question from Equilibrium
What is the relationship between chemical equilibrium and the
rates of forward and reverse reaction?
In equilibrium, the forward reaction rate must be greater
than the reverse reaction rate.
In equilibrium, the forward reaction rate must be less than
the reverse reaction rate
In equilibrium, the forward and reverse reaction rates must
be equal.
In equilibrium, both forward and reverse reactions must
stop.

35. $200 Answer from Equilibrium
In equilibrium, the forward and reverse reaction rates must
be equal.

36. $300 Question from Equilibrium
For the equilibrium:
NH3 (aq) + HNO3 (aq) <==>NH4+ (aq) + NO3- (aq)
What will happen if HNO3 is added?
Shift left
Shift right
Stay the same
None of the above

37. $300 Answer from Equilibrium
B. Shift right

38. $400 Question from Equilibrium
For the equilibrium:
NH3 (aq) + HNO3 (aq) <==>NH4+ (aq) + NO3- (aq)
What will happen if NH3 is removed?
Shift left
Shift right
Stay the same
None of the above

39. $400 Answer from Equilibrium
Shift left

40. $500 Question from Equilibrium
For the equilibrium:
NH3 (aq) + HNO3 (aq) <==>NH4+ (aq) + NO3- (aq)
What will happen if pressure is increased?
Shift left
Shift right
Stay the same
None of the above

41. $500 Answer from Equilibrium
C. Stay the same

42. $100 Question from Nuclear and Biochem
The process of nuclear change in an atom of radioactive
material is called
Nuclear decay
Isotopes
Nuclear mass
Radon.

43. $100 Answer from Nuclear and Biochem
Nuclear decay

44. $200 Question from Nuclear and Biochem
The type of nuclear radiation that can penetrate farthest
through matter is called
Radons
Gamma rays
Neutron emission
X rays

45. $200 Answer from Nuclear and Biochem
B. Gamma rays

46. $300 Question from Nuclear and Biochem
A sufficiently large nucleus is unstable and has a tendency to show
spontaneous radioactive emissions. What is the reason for these
spontaneous emissions?
The nuclear force between the protons overcomes the
electrostatic force of repulsion.
The electrostatic force of repulsion between the protons
overcomes the nuclear force.
The electrostatic force of repulsion between the protons reduces
and becomes equal to the nuclear force.
The nuclear force between the protons reduces and becomes
equal to the electrostatic force of repulsion.

47. $300 Answer from Nuclear and Biochem
The electrostatic force of repulsion between the protons
overcomes the nuclear force.

48. $400 Question from Nuclear and Biochem
Which polymer is made up of glucose subunits?
Crystals
Hydrocarbons
Proteins
Starches

49. $400 Answer from Nuclear and Biochem
D. Starches

50. $500 Question from Nuclear and Biochem
Proteins can be referred to as polypeptides. How are peptides
related to amino acids?
Peptides are the monomers, amino acids are the linkages
between them.
Amino acids are the monomers, peptides are the linkages
Amino acids and peptides are different names for the
same structures.
Amino acids are the side groups, peptides the main chain
of a protein.

51. $500 Answer from Nuclear and Biochem
Amino acids are the monomers, peptides are the linkages
between them.

52. Final Jeopardy There are three main types of decay: alpha,
beta, and gamma. Compare and contrast these
3 types of decay and label the following as
alpha, beta or gamma:
3919K  electron Ca

53. Final Jeopardy Answer