Q. 334.5( 2 Votes )

State a condition under which a bimolecular reaction is kinetically first order reaction.

Answer :

A condition under which the order of a chemical reaction can be altered is by taking the solvent or the reactant in the excess amount due to which its concentration does not change much.


For example,


CH3COOCH3 + H20 CH3COOH + CH3OH


Initially, rate is given by,


Rate= k’ [CH3COOH] [H2O]


When we add an excess of solvent then,


Rate= k[CH3COOCH3]


Here k= k’[H2O]


This is also known as pseudo first-order reaction.


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