Question

A chemist finds that when platinum is added to a reaction, the reaction speeds up. He thinks the platinum may be acting as a catalyst. What measurement should the chemist make to determine whether it is a catalyst?

Measure the mass of the platinum before and after the reaction.
Measure the temperature of the solution before and after the reaction.
Measure the change in volume of the solution.
Measure the amount of gas released by the reaction.

Answer 1

one sec

Answer 2

okk

Answer 3

Measure the mass of the platinum before and after the reaction. Catalysts themselves do not undergo any changes so the mass should be the same.

Answer 4

thats what i thought thanks!!!

Answer 5

thanks