Cliffs AP Chemistry, 3rd Edition

49.The value of Kafor lactic acid, HLac, is

1.5 × 10 –5. What is the value ofKbfor

the lactate anion, Lac–?

A. 1.0 × 10 –14

B. 8.5 × 10 –10

C. 6.7 ×l0–10

D. 8.5 × 1010

E. It cannot be determined from the

information provided.

50.How many grams of NaOH are required

to neutralize 700 mL of 3.0 N HCl?

A. 2.1 grams

B. 21 grams

C. 42 grams

D. 84 grams

E. 102 grams

51. Solid calcium carbonate decomposes to
    produce solid calcium oxide and carbon
    dioxide gas. The value of ∆G°for this
    reaction is 130.24 kJ/mole. Calculate
    ∆Gat 100°C for this reaction if the
    pressure of the carbon dioxide gas is
    1.00 atm.

A. −998.56 kJ/mole

B. −604.2 kJ/mole

C. 56.31 kJ/mole

D. 130.24 kJ/mole

E. 256.24 kJ/mole

52. Which of the following choices
    represents^23994 Puproducing a positron?

A.^23994 Pu"^23594 Pu+ 24 He

B.^23994 Pu"-^01 e+^23993 Np

C.^23994 Pu+-^01 e"^23993 Np

D.^23994 Pu+^01 e"^23993 Np

E.^23994 Pu+ 24 He"^23592 U

53.Ni^saq aqshNi2+__iiAg Ag^h

Ni + 2025 e Ni s E. volt

red

(^2) +=--" ^h%
Ag+-+=e "Ag s E^h%red 080. volt
Which of the following statements is
true of the above reaction?
A. The reaction is spontaneous,
E°= 1.05 volts.
B. The reaction is nonspontaneous,
E°= −1.05 volts.
C. The reaction is spontaneous,
E°=−1.05 volts.
D. The reaction is spontaneous,
E°= 0.55 volt.
E. The reaction is nonspontaneous,
E°= −0.55 volt.
Part IV: AP Chemistry Practice Test