a catalyst is a chemical that increases the rate of a chemical reaction without itself being changed by the reaction. the fact that they aren't changed by participating in a reaction distinguishes catalysts from substrates, which are the reactants on which catalysts work. enzymes catalyze biochemical reactions.
pressing on an inflated
balloon decreases its size.
equilibrium constant is the ratio of product of concentration of products to the product of concentration of reactants each term raise to their stochiometric coefficients.
thus for the reaction:
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