Summary of all the ways to determine order of a reaction

# Summary of all the ways to determine order of a reaction -...

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How to Determine Orders of Reaction In many kinetics problems, the first order of business (a pun) is to determine the order of a reaction. The order of a reaction is simply the sum of the exponents on the concentration terms for a rate law: Rate = k[A] x [B] y reaction order = x + y Example 1: Rate = k [A] 1 [B] 0 = k [A] is 1st order in [A] and 0th order in [B] and 1st order for the reaction . Example 2: Rate = k [A] 3 [B] 0.5 is 3rd order in [A] , half order in [B] and 3.5 order overall . What does the reaction order tell us: We need to know the order of a reaction because it tells us the functional relationship between concentration and rate . It determines how the amount of a compound speeds up or retards a reaction. For example, a reaction order of three means the rate of reaction increases as the cube of the concentration . A reaction order of -1 means the compound actually retards the rate of reaction . Determining Reaction Order: Here are four ways to learn the order of reaction from easiest to hardest: 1. They tell you in the problem. "In the first order reaction of …." 2. You are given units for the rate constant

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Summary of all the ways to determine order of a reaction -...

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