elmaschido123 elmaschido123
  • 13-02-2017
  • Chemistry
contestada

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

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Edufirst
Edufirst Edufirst
  • 21-02-2017
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. 
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