## Order of the Reaction

$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

Juliet Stephenson 4E
Posts: 100
Joined: Wed Sep 18, 2019 12:21 am

### Order of the Reaction

What exactly does the order of the reaction mean and how do we determine it? I read in my notes that it is equivalent to the number of molecules of the reactant which are colliding during the slowest step of the reaction, but I feel like I'm missing some context.

Louise Lin 2B
Posts: 97
Joined: Sat Aug 17, 2019 12:15 am

### Re: Order of the Reaction

the order of the reaction means that the rate is proportional to the concentration of types of molecules involved in the reaction. the reactants must collide simultaneously, with enough energy and the correct orientation to make a reaction happen.

Kassidy Ford 1I
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### Re: Order of the Reaction

As for the slow part in your notes, Lavelle was trying to emphasize that the rate is only dependent on the slowest step in the reaction mechanism. Think of his brownie analogy, if a group is making brownies and it takes 5 minutes to make the batter but 25 minutes to bake the brownies, then it no matter how fast the mixing happens the rate will always be dependent on the baking step!