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b.v.krishna pernamitta

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catalyst role in reactions

Catalysts acts like a mediator where chemicals can’t react by they themselves. (Amount of catalyst before and after reaction will be unaltered).
Any compound reacts to get noble stabilization. Depending on their oxidizing n reducing powers to attain stability. In real sense, depending upon their dominating power, most oxidizing n most reducing will react fastly comparatively as there is greater need for them.
When A & B has to react, the catalyst C goes and reacts with A (or B), C-A bond is formed, then this reacts with B., finally A-B bond is formed, C position is unaltered. … … … C has much ability to react with A than B., means C is reactive, has more reactive power (more need for bond!!!). If so, then A-C bond should be ultimate climax of the drama!!! Why C came back!!!

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    Sep 14 2012: The catalyst speeds up the reaction by temporarly forming a molecular species that is more stable than the transition state but less stable than the product. As you stated if the catalyst forms the C-A bond and this bond is more stable than the product then it would cease to be the catalyst and the product would simply be C-A. Between reactant and product there is always a molecular species which represents a moment when the reactant transitions to product, it is neither the reactant nor the product, but a short lived transition state where chemical bonds are breaking and forming. This transition state is very short lived but it represents a high energy barrier from reactant to product in many chemical reactions. A catalyst will lower this energy barrier by temorarily forming an alternative transition state with a temporary intermediate such as C-A. This intermediate will break down to make the same final product A-B.