5 Steps to a 5 AP Chemistry

334  STEP 5. Build Your Test-Taking Confidence

67.How many moles of Cr may be deposited on the
cathode when 0.60 F of electricity is passed
through a 1.0 M solution of Cr^3 +?

(A) 0.60 mol

(B) 0.80 mol

(C) 1.0 mol

(D) 0.30 mol

(E) 0.20 mol

Given the above standard reduction potentials,

estimate the approximate value of the equilib-

rium constant for the following reaction:

(A) 10^4

(B) 10^16

(C) 10–16

(D) 10–8

(E) 10^8

69.2 Bi^3 ++3 SnO 2

2–

+6 OH–→3 SnO 3

2–

+3 H 2 O +

2 Bi

The reducing agent in the above reaction is

which of the following?

(A) Bi^3 +

(B) SnO 2 2–

(C) Bi

(D) H 2 O

(E) OH–

Questions 70 and 71 are concerned with the fol-
lowing half-reaction in an electrolytic cell:

2 IO 3

• 
  
  
  
  • 
    

    6H 2 O + 10 e

    
    

    →I 2 + 12 OH
    
       -

    
    
  
  
  
  

70.Choose the correct statement from the following
list.

(A) This reaction occurs at the anode.

(B) The iodine is reduced from +5 to –1.

(C) The iodine is oxidized from –1 to 0.

(D) This reaction occurs at the cathode.

(E) Water is a catalyst.

71.If a current of 7.50 amp is passed through the

electrolytic cell for 0.45 h, how should you calcu-

late the grams of I 2 to form?

(A) (7.50)(0.45)(3600)(253.8)/(10)

(B) (7.50)(0.45)(3600)(126.9)/ (96500)(10)

(C) (7.50)(0.45)(60)(253.8)/(96500)(10)

(D) (7.50)(0.45)(3600)(253.8)/ (96500)(10)

(E) (7.50)(0.45)(126.9)/(96500)(10)

72.The formation of Th from occurs by

(A) electron capture

(B)αdecay

(C)βdecay

(D) position decay

(E)γdecay

73.What is the missing product in the following

nuclear reaction?

74.

The above compound would be classified as

(A) an aldehyde

(B) a ketone

(C) an ester

(D) a carboxylic acid

(E) an alcohol

75.The transition state is higher in energy than the

reactants by an amount called

(A) the heat of reaction

(B) the reaction energy

(C) the free energy

(D) the kinetic energy

(E) the activation energy

O

||

HO C CH−− − 23 CH

(E)^9841 Nb

(D)^9840 Zr

(C) 3996 Y

(B) 3896 Sr

(A) 3999 Y

92

236

0

1

53

UnI→++ 4 136 ____

92

(^234) U
90
230
Zn Co+→+^22 ++Zn Co
68.Co e Co v
Zn e Zn v
2+
2+

+→ °=−

+→ °=−

−

−

2028

2076

E

E

.

.

STOP. End of AP Chemistry Practice Exam 2—Multiple Choice