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Question:

About chemical catalysts

A substance involved in chemical reflection, but reflects the quality of the material before and after the change, you say it is a catalyst?

Answer:

The role of the catalyst is to change the reaction rate of the chemical reaction, which itself does not participate in the reaction! The
A catalyst is a substance that accelerates the reaction rate of other reactions and whose quality and chemical properties do not change. Sometimes the catalyst can also participate in the reaction. The elemental iodine in the title is the catalyst for the decomposition of hydrogen peroxide.
Is a catalyst. Principle and burning black copper wire and ethanol reaction to produce acetaldehyde the same
Is a catalyst. The catalyst is actually involved in the reaction, (these are multi-step reaction), but in the final time from the reaction out.

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