Question

What are catalysts ?

Give an example of a catalyst involved in a chemical reaction ?

Write it in the form of chemical equation !

Answer 1

Hello!!

Here's the answer to your question...

→Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst, which is not consumed in the catalyzed reaction and can continue to act repeatedly. Often only tiny amounts of catalyst are required in principle.

→1. Preparation of oxygen by thermal decomposition of KClO3:

  **2KClO3 = 2KCl + 3O2   ( Manganese dioxide).

2. Contact process for the manufacture of sulphuric acid:

   **2SO2 + O2 = 2SO3    (Vanadium pentoxide).




Hope this helps....

Answer 2

A catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction. A catalyst will appear in the steps of a reaction mechanism, but it will not appear in the overall chemical reaction (as it is not a reactant or product). Generally, catalysts alter the mechanism of the reaction in a substantial way such that the new barriers along the reaction coordinate are significantly lower. By lowering the activation energy, the rate constant is greatly increased (at the same temperature) relative to the uncatalyzed reaction.
There are many types of catalysts in the world. Many reactions are catalyzed at the surface of metals. In biochemistry, enormous numbers of reactions are catalyzed by enzymes. Catalysts can either be in the same phase as the chemical reactants or in a distinct phase.
Catalysts in the same phase are called homogeneous catalysts, while those in different phases are called heterogeneous catalysts.