Section 17.4
Instantaneous Reaction Rates and Reaction Mechanisms
Practice Test
1.
What quantity is defined by the change in concentration of a component in a chemical reaction divided by the change in time of the reaction?
a.
specific rate constant
b.
rate order
c.
instantaneous rate
d.
catalyst
Hint
2.
What is the instantaneous rate for a reaction that is second order in A and first order in B when [A] = 2
M
and [B] = 3
M
? The specific rate constant for the reaction is 0.1
M
-2s-1.
a.
12
M
/s
b.
1.2
M
/s
c.
0.12
M
/s
d.
0.012
M
/s
Hint
3.
What is the slowest of the elementary steps in a complex reaction called?
a.
mechanism
b.
propagating step
c.
rate-limiting step
d.
fast step
Hint
4.
What are the units that generally express a reaction rate?
a.
liters per mole per second
b.
moles per liter per second
c.
seconds per liter per mole
d.
seconds per mole per liter
Hint
5.
What is the name given to a chemical produced in one elementary step and used up in a subsequent elementary step?
a.
complex step
b.
elementary step
c.
reaction mechanism
d.
intermediate
Hint
6.
What are the individual steps in a complex reaction known as?
a.
complex steps
b.
elementary steps
c.
intermediate steps
d.
rate-determining steps
Hint
