Question

what is pseudo first order reaction?

Answer 1

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Pseudo First Order Reactions. There are circumstances where a secondorder reaction might appear, in an experiment, to be first order. That is when one of the reactants in the rate equation is present in great excess over the other in the reactionmixture.HOPE IT HELPS YOU!!

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Answer 2

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Here is your answer

A term sometimes used for a rate coefficient. For example, if the rate equation is: the function is the pseudo first-order rate constant (or first-order rate coefficient) with respect to B. Similarly, is the pseudo first-order rate constant (or first-order rate coefficient) with respect to A.
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There are circumstances where a second order reaction might appear, in an experiment, to be first order. That is when one of the reactants in the rate equation is present in great excess over the other in the reaction mixture.
For example, a second order reaction of the type A + B --> C is dependant on the concentrations of both A and B.
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If the concentration of one relative reactant remains constant because it is supplied in great excess, its concentration can be absorbed at the expressed constant rate, obtaining the pseudo first order reaction constant, because in fact, it depends on the same concentration of only one of the two reactants.
For example, a second order reaction of the type A + B --> C is dependant on the concentrations of both A and B. But monitoring the concentration of two different reactants at the same time is very difficult.
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