How to find order of reaction ?
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To determine the order of reaction in a chemical equation, identify the rate equation from the reaction. Identify the order of each reactant based on its exponent, but do not include reactants with an exponent of 0. Add the order of all of the reactants together to find the overall reaction order.
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Identify the order of each reactant.
Each reactant listed in the rate equation will have an exponent of either 0, 1, or 2 (above 2 is very rare). That exponent denotes the order of that reactant. Looking at each exponent:
- A zero means that the concentration for that reactant has no bearing on the rate of reaction.
- A one means that increasing the concentration of this reactant will increase the rate of the reaction in a linear way (doubling the reactant doubles the rate).
- A two means that the rate of the reaction will increase by the square of the increased. concentration (doubling the reactant will increase the rate by four times).
- Zero order reactants are often not listed in the rate equation, since any number to the zeroth power is equal to one.
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