And the same thing was true for this particular case. So we see that the order of the reaction basically describes the rate of the reaction and how it actually depends on the concentration of those reactants. So let's begin with the first order reaction that we basically described in this lecture. So when a reaction rate is directly proportional to the concentration of the reactant, it is set to be first order with respect to that reactant. So in this particular case, because the exponent is one, this is a first order reaction. And that means the rate law or the rate of that particular reaction depends directly, is directly proportional to the concentration.