Both homogeneous and heterogeneous catalysts participate in elementary steps of a…
CHEMISTRY · Single correct · AP · Chemistry · Kinetics · Kinetics
Problem
Both homogeneous and heterogeneous catalysts participate in elementary steps of a mechanism. Which of the following most accurately compares their net concentrations during the reaction?
(a) Only homogeneous catalysts are regenerated, whereas heterogeneous catalysts are permanently incorporated into the product.
(b) Both types exhibit no net change in concentration because any catalyst consumed in one step is regenerated in a later step.
(c) The concentration of both types of catalysts gradually decreases because they are consumed as reactants during the reaction.
(d) Homogeneous catalysts maintain a constant concentration only when added in stoichiometric excess, whereas heterogeneous catalysts always remain constant by definition.