Lesson: Orders of Reaction Glencoe • Chemistry • Matter & Change • Chemistry • The Molecular Nature of Matter and Change • Eighth Edition • Glencoe Science • Chemistry • Matter and Change

Chemistry

In this lesson, we will learn how to use a rate law to deduce the order of reaction for each reactant.

Worksheet

Q1:

Hydrogen reacts with nitric oxide to form nitrous oxide and water, as shown. H()+2NO()NO()+HO()222gggg

The rate law for this reaction is 𝑘[NO][H]22.

What is the order of reaction with respect to nitric oxide?

What is the order of reaction with respect to hydrogen?

What is the overall order of reaction?

Q2:

Methanol (CHOH)3 reacts with ethyl acetate (CHCHCOOCH)323 via a transesterification reaction, producing methyl acetate (CHCOOCH)33 and ethanol (CHCHOH)32. CHOH()+CHCHCOOCH()CHCOOCH()+CHCHOH()33233332aqaqaqaq

The rate law for this reaction under certain conditions is rate = 𝑘[CHOH]3.

What is the order of reaction with respect to methanol?

What is the order of reaction with respect to ethyl acetate?

What is the overall order of reaction?

Q3:

In an acid-catalyzed reaction between compounds A and B at a temperature 𝑇, compound A is the limiting reactant and compound B is in excess. The rate equation is given by rate = 𝑘[A], where 𝑘 is a pseudo-first-order rate constant. Which of the following does not affect 𝑘?
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