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Rate_equation

The rate equation (or rate law) is an equation used to calculate the speed of a chemical reaction (or rate of reaction). For a general reaction aA + bB → C, the rate equation is:

\displaystyle{ v\; =\; k[\mathrm{A}]^x[\mathrm{B}]^y }

Here, [A] and [B] are the concentrations of A and B. x and y depend on which step is rate-determining. If the reaction mechanism is a very simple one, where A and B hit each other and then go to products through one transition state, then x=a and y=b. k is the rate constant of the reaction. This changes with temperature, pressure and other conditions.

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