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When a chemical reaction is carried out in an industrial setting, it is very common to...

When a chemical reaction is carried out in an industrial setting, it is very common to have one of the reactants present in an excess amount above the stoichiometric quantity that would be needed for the reaction. Why?

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Answer #1

1. When concentration of reactant 1 is kept high and constant that is in excess amount then the reaction is coerced to follow first order kinetics.

We can now determine the order of the reaction with respect to reactant 2.

2. In the second experiment the reactant 2 concentration can be kept high and constant and the order of the reaction can be determined with respect to reactant 1.

Thus it is possible to determine the rate law expression and hence overall order of the reaction.

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