Chemistry: Matter and Change

Section 3: Reaction Rate Laws

Self Check Quizzes

1
The rate law for the reaction between nitrogen monoxide and hydrogen is Rate = k[NO2]2[H2]. What happens to the rate if the concentration of nitrogen doubles?

Rate = k[A]m[B]n
A)The rate doubles.
B)The rate triples.
C)The rate quadruples.
D)The rate is reduced by half.
2
The exponents in a rate-law expression define the __________, which describes how the rate is affected by the concentration of the reactant.
A)instantaneous rate
B)concentration
C)specific rate constant
D)reaction order
3
What is the overall reaction order for the following rate-law expression?

Rate = k[A][B]2[C]3
A)4
B)5
C)6
D)7
4
How are the rate law and the order for a complex reaction determined?
A)by calculation
B)by experimentation
C)by trial and error
D)by estimation
5
As reactants are consumed and fewer particles are available to collide, most chemical reactions ________.

Rate = k[A]
A)speed up
B)slow down
C)stop
D)continue at the same rate
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