Question

A researcher is designing a laboratory experiment to determine whether the inorganic substance A affects the rate of a reaction between two colored liquids,X and Y. When the reaction is complete, the liquid is clear. The reaction between X and Y is similar to one used by manufacturers to produce certain chemicals in factories
Which method would best answer his question about reaction rate and what will he find out about substance A

Answer 1

First he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance is a catalyst