Predict the overall reaction from the following two-step mechanism: A2+2AB→→A2A2B(slow)(fast)

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13-02-2017
Chemistry

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Predict the overall reaction from the following two-step mechanism: A2+2AB→→A2A2B(slow)(fast)

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Edufirst Edufirst · Answer 1 · 2017-02-21T12:54:42+01:00

The two-step mechanism is:

[tex]2A-\ \textgreater \ A_2[/tex] slow

[tex]A_2+B -\ \textgreater \ A_2B[/tex] fast

The overall reaction is the sum of the two reactions:

[tex]2A+A_2+B -\ \textgreater \ A_2+A_2B[/tex]

Now you can cancel the the terms that appear in both sideds:

[tex]2A+B -\ \textgreater \ A_2B[/tex]

The fact that one reaction and the other is fast does not change the product. It does change the spped (rate) of reaction, but that is a different point.