When an enzyme is diluted with water, what is slowing down the rate of reaction?
[&hellip;] there's the same number of catalase molecule within an undiluted and a diluted solution. Also, seeing as water is not an enzyme inhibitor, [&hellip;]


Q: Why is dating between a fixed number of guys and girls more difficult on a large square packed with nuns than in a small club (without the nuns)? ;)

A: It's more difficult to bump into each other since the girls a more far away and there are legions of nuns in between!

You are right in that the absolute amount of catalase molecules does not change upon dilution, but the concentration does!

Reactions are about collisions of the reactants and in the case of dilutions, there are more collisions with innocent bystanders than with an other reactant.