Under certain conditions, the 2nd order kinetics can be well approximated as first order kinetics. These Pseudo-1st-order reactions greatly simplify quantifying the reaction dynamics.
Learn what a pseudo first order reaction is in Chemistry. Find the definition, rate law, formula, examples, and key differences for fast exam revision.
Pseudo means fake or false. A pseudo-first-order reaction is defined as a reaction that appears like a higher order reaction but is actually of a lower order. A pseudo-first-order reaction is a bimolecular reaction that appears like a first order (1st order) reaction due to more concentration of reactants than the other reactants. But, it is different from the first-order reaction. In this ...
Pseudo-First order A very important case is that of pseudo-first order kinetics. This is when a reaction is 2nd order overall but is first order with respect to two reactants. This is a very common kinetic scheme. \ [\rm {rate = k [A] [B]}] where A and B are some generic reactants. Now the kinetics of this reaction can be a bit complicated.
A pseudo-order reaction is one that appears to follow a simpler rate law than its true rate law because the isolation method has been applied. The order with respect to the excess reactant gets hidden inside k o b s kobs, so the observed overall order is lower than the true overall order.
A Pseudo first-order reaction can be defined as a second-order or bimolecular reaction that is made to behave like a first-order reaction. This reaction occurs when one reacting material is present in great excess or is maintained at a constant concentration compared with the other substance.