Review Questions

1 . All of  the following   are true    statements  concerning  reaction    orders  EXCEPT:

(A) The rate    of  a   zero-order  reaction    is  constant.

After   three   half-lives, a   radioactive sample  will    have    one-ninth   of  its original

concentration.

(B)

(C) The units   for the rate    constant    for first-order reactions   are s−1.

If  doubling    the concentration   of  a   reactant    doubles the rate    of  the reaction,   then

the reaction    is  first   order   in  that    reactant.

(D)

2 . The half-life   of  radioactive sodium  is  15.0    hours.  How many    hours   would   it  take    for a   64  g

sample  to  decay   to  one-eighth  of  its original    concentration?

(A) 3

(B) 15

(C) 30

(D) 45

3 . Consider    the following   hypothetical    reaction    and experimental    data:

[A] 0   (mol/L) [B] 0   (mol/L) Rate

Exp 1 0.10 1 0.035

Exp 2 0.10 4 0.070

Exp 3 0.20 1 0.140

Exp 4 0.10 16 0.140