Answers to SN2 Zumdahl's Even-Numbered Problems, 11th Ed.

Chapter 12 − Chemical kinetics

12-52
a. 
Rate = k[A]2     Integrated rate law:   1   =   1  + kt      k = 3.60 × 10−2 L/(mol.s)
[A] [A]o
b.  t1/2 = 9.92×103 s
c.  t = 2.98 × 104 s
12-62
a.  160. s.
b.  4.33 × 10−3.s−1
c.  532 s
12-66
a.  k = 0.555 L/(mol•s)
b.  t = 16 s
12-80
  rate law (b)

Chapter 13 − Chemical equilibrium

13-76
a.  P(NO2) = 1.0 atm, P(N2O4) = 4.0 atm
b.  P(NO2) = 1.0 atm, P(N2O4) = 4.0 atm
c.  No
13-100
a.  K = 4.0 × 103
b.  K = 8.0 × 10−2
c.  K = 8.0 × 1018
13-116
a.  to the left
b.  to the left
c.  to the left
d.  to the right

Chapter 14 − Acid and bases

14-44
a. 
HCN(aq) ⇌ H+(aq) + CN−(aq)     ,     K =  [H+][CN−]
[HCN]
b. 
HOC6H5(aq) ⇌ H+(aq) + OC6H5−(aq)     ,     K =  [H+][OC6H5−]
[HOC6H5]
c. 
C6H5NH3+(aq) ⇌ H+(aq) + C6H5NH2(aq)     ,     K =  [H+][C6H5NH2]
[C6H5NH3+]
14-92
  6 × 10−2 M
14-130
  HClO4 > HNO2 > HONH3ClO4 > CaBr2 > KNO2

Chapter 15 − Acid and bases (buffer)

15-122
a.  weakest acid = (f)
b.  strongest acid = (a), a strong acid has a pH = 7 at equivalence point
c.  acid (d) has a 1/2 equivalence point of pH = 6 corresponding to its pKa. (Ka = 1 x 10−6)

Chapter 16 − Solubility and complex ion equilibria

16-36
 Ksp = 5.3 × 10−12
16-62
a.  AgF
b.  Pb(OH)2
c.  Sr(NO2)2
d.  Ni(CN)2