# Reaction rate and rate law

It can be zero and does not need to be an integer. You'd have to know the mechanism of your reaction.

### Reaction order

But it can change. So, capital R is the rate of our reaction, right? The order of a reaction is important in that it enables us to classify specific chemical reactions easily and efficiently. We have only one reactant here. If m or n is zero, the reaction is zero order in A or B, respectively, and the rate of the reaction is not affected by the concentration of that reactant. Not all variables are needed to solve for the rate. And there's a difference between the rate of our reaction and the rate constant.

And so we use the initial rate, where we have only reactants present, and no products. There are dimensions to k and that be determined with simple dimensional analysis of the particular rate law. A new, especially reactive segment of the reactant, called the saddle domain, is introduced, and the rate constant is factored: k.

So two, all right, so two to what power X, two to what power X is equal to one? For nearly all forward, irreversible reactions, the rate is proportional to the product of the concentrations of only the reactants, each raised to an exponent. And so those would also be your units for K. K would be in molar per second.

If you increase the concentration of your reactants, you increase the rate of your reaction.

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