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What are pseudo first order reactions ? ...

What are pseudo first order reactions ? Give one example.

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The reactions which appear to be second-order but follow the first order.rate equation are called Pseudo first order reactions.
Example `CH_(3)COOC_(2)H_(5)+H_(2)O overset(H^(+)) to CH_(3)COOH+C_(2)H_(5)OH`
Since the concentration of water is large excess, the chằnge in concentration of water is negligible. So Its concentration is . taken as constant. Then rate of reaction depend only on the concentration of `CH_(3)COOC_(2)H_(5)`.
Rate `=K[CH_(3)COOC_(2)H_(5)]`
Inversion of cane sugar is another example of pseudo first order reaction.
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