a) Yes, you can probably tell because the activation energy gets lower and thus allow the reaction to speed up way faster than without a catalyst... it's kind of dumb to ask if in catalyst is involved in a CATALYZED reaction...
b) No, the catalyst will get recycled at the end of the reaction.
When a reaction is catalyzed:
a) Is the catalyst involved in the reaction? (State your evidence)
b) Has the catalyst been consumed when the reaction is complete?
2 answers
a)Yes, the catalyst enters into the reaction.
b) Although the catalyst enters into the reaction, it is regenerated in a subsequent step; the net effect is that none of it is consumed.
Here is a site that gives some examples.
http://en.wikipedia.org/wiki/Catalyst
b) Although the catalyst enters into the reaction, it is regenerated in a subsequent step; the net effect is that none of it is consumed.
Here is a site that gives some examples.
http://en.wikipedia.org/wiki/Catalyst