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Veritas Kim 2L wrote:What is pseudo-first order reaction and how is that related to the second-order reaction?
You can use a pseudo-first order reaction if you have more than one reactant. You would make the concentration of one of you reactants extremely high, and make the concentration of you second reaction low. Since the concentration of one reactant is so high, it remains effectively constant and therefore we can treat it as a constant. The constant for the reactant in high concentration is included in the constant k, and renamed k'. This means you now only have one reactant changing so it is in theory a first order reaction.
From what I remember from lecture, K is the rate constant for a normal reaction. K' is the rate constant for the pseudo-reaction where the other reactants are in very high concentrations. In other words, K' is the rate constant for the experimental reaction with just the one reactant. In addition, k and k' can be mathematically related too. Using the example reaction in lecture, k= k'/([B]o^M) * ([C]o^L).
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