How to Find out the Overall Order of a Reaction – Part 1

The order of reaction is a number which quantifies the degree to which the rate of a chemical reaction depends on concentrations of the reactants.


In other words, the order of reaction is the exponent to which the concentration of a particular reactant is raised. One could write the rate equations for the given sets of data and solve for the orders w.r.t. the reactants. However, there exists a shortcut if the given data is simple!

Question:

The following data is for a reaction between the reactants A & B:

Rate (M s─1)

[A] (M)

[B] (M)

2 x 10─3

0.1

0.1

4 x 10─3

0.2

0.1

1.6 x 10─2

0.2

0.2

What’s the overall order of the reaction?

Solution:



Click/tap to enlarge the image
Precise answer❓ Let Chemaficionado know in the comments below or at mychemistryhomework@gmail.com❗

Reference:

Wikipedia Contributors. Rate equation. Wikipedia. https://en.wikipedia.org/wiki/Rate_equation.

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