## Determining Reactions

$\frac{d[R]}{dt}=-k; [R]=-kt + [R]_{0}; t_{\frac{1}{2}}=\frac{[R]_{0}}{2k}$

Frenz Cabison 1B
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Joined: Fri Sep 29, 2017 7:07 am

### Determining Reactions

How do we determine if something is zero-, first-, or second- order reaction?

DianaTrujillo2K
Posts: 40
Joined: Fri Sep 29, 2017 7:04 am

### Re: Determining Reactions

One way we have learned to determine the order of each reactant in a reaction is the method of initial rates. Using this method we run many experiments and determine the order of each reactant by seeing how a change in initial concentration of a reactant changes the initial rate of the reaction. Adding the order of each reactant gives us the overall order of the reaction.

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### Re: Determining Reactions

We can also use the k constant to narrow it down to what order it might be. 0 and 1storder have negative k constant and 2nd order has positive k constant.