Chemical Kinematics

Question 1

Rate of a Reaction

Answer 1

– defined as the change in the
concentration of reactants or products per change in
time.

Question 2

Rate=

Question 3

Rate Law

Answer 3

– is a mathematical expression that shows
how the rate of reaction depends on the concentration
of the reactants.

Question 4

Consider a simple hypothetical reaction involving only
one reactant.
A → products
The rate law for this reaction is expressed as:

Answer 4

rate = k[A]x
where:
k – rate constant
power of x – order of the reaction with respect
to reactant A

Question 5

Zero-order reaction (x=0)

Answer 5

– has a constant rate
that is equal to its rate constant regardless of
changes in the concentration of the reactant.

Question 6

Zero order reaction rate expressed as

Answer 6

rate = k[A]⁰ = k

Question 7

First-order reaction (x=1)

Answer 7

general, the rate increases
in the same order as the concentration of the
reactant.

Question 8

First order reaction aa

Answer 8

rate = k[A]¹ = k[A]

Question 9

Second-order reaction (x=2)

Answer 9

increasing the
reactant concentration to twice as much as
quadruples the original reaction rate. A triple
increase in concentration means a ninefold
increase in reaction rate.

Question 10

Second order reaction

Answer 10

rate = k[A]²