how can you tell that a substance serves as a catalyst?

Question

like, what evidence do you see/hear/smell ?
anything??

Answer 1

time rate of reactions with and without the catalyst
if the time is significantly quicker with the substance, then it is a catalyst

Answer 2

Catalyst Substance

Answer 3

A catalyst is a substance that drives the reaction into a different thermodynamics pathway between products and reactants. The crux of this pathway is that the transition state is lower in energy than the original and therefore has a lower activation energy and a faster rate. Additionally the catalyst is not consumed during the reaction. Therefore the only thing you could possibly see is a much faster rate of reaction.

Answer 4

There are two kinds of catalysis.

Surface catalysts are not at all affected by the reaction. They just provide a place for it to happen. Platinum is known to have this effect for some reactions.

Pseudo-catalysts actually form chemical bonds during the reaction, but usually there is a sequence of reactions. By the end of the sequence, if you some fussy tests, you would find the same amount of the pseudo-catalyst in the same form in which it started.

As noted, you would recognize catalysis by its effect on the reaction rate. If the rate gets SLOWER, the material is an anti-catalyst - that is to say, an inhibitor.

Answer 5

catalyst are compounts which speed up a reaction by making collisions more likely.
If you want to know if the substance serves as a catalyst, you should try recording the information without a catalyst. Try it again with a substance.
if that substance speeds up the rate of the reaction then, you found your catalyst.
hope it helps

Answer 6

Catalys acts as a harderner. Catalyst is mostally made of Methyl ethyl keytone peroxide. You wont see or hear or smell much,but if you mix with resing and stir you will notice it get a little thicker

hope this help

Answer 7

the strongest evidence is not a physical evidence but the average of rate of reaction.
a positive catalyst will increase up the rate of reaction.
a negative catalyst will decreases the rate of reaction.