Negative reaction Order

[Nicole Mazaheri 1F]

When do you know if you have to include the products in the rate law and thus include a negative order of reaction? For example, in the decomposition of ozone, why is the product included in the reaction rate with a negative reaction order versus what we have seen with other reactions only including the reactants in the rate law?

[mlomas2004]

In certain reactions, products may influence the reaction rate. Including products with a negative reaction order in the rate law signifies their inhibitory effect. This occurs when the presence of the product(s) decreases the rate of the reaction, as seen in the decomposition of ozone, where oxygen acts as an inhibitor.

[Sophia Lim 2A]

In certain reactions, including the products in the rate law with a negative reaction order can be appropriate when the rate of the reaction is influenced by the concentration of the products themselves. This situation typically arises in complex reaction mechanisms where the products participate in subsequent steps that affect the rate of the overall reaction.