Question

why is it important to say a catalyst that speeds up a reaction remains unchan

Answer 1

rhe role of a catalysr is to decrease the activation energy of reactant molecules so as to increase their collision frequency with the other milecules..it never forms or creares any kind of chemical bonds with the reactant milecules ...but if it were then we would never get our desired product as once catalsts would have attacked all the acrive sites of reactant molecules , no new bonds could be created to form products.....to prevent this we will never want our catalyst to react with reactant molecules...