Question

Suppose a biological catalyst (enzyme) was used in a reaction at a rate limiting step of a reaction. Would changing the amount of catalyst present change the rate of the reaction? What would the reaction order be for the catalyst? Justify your answer.

Answer 1

in reaction if reaction takes palce several steps , among all steps slowest step can be treated as rate limiting step.

in general catalyst increases the reate of the reaction . at the rate limiting step the reaction must be slow . so we do not need catalyst at that stage. so there is no change the amount of catalyst.

gerenally order of the reaction always we look with respect to reacting species.

rate directly proportional to reactant concentrations

so order does not depend on catalyst . so the reaction order be for the catalyst zero