In the second step, notice that the reactant, this guy is the intermediate, this guy. So the product of step one is the reaction of step two and that means step two will be dependent on step one and that's because the intermediate is part of the reactive part of the slow step process. So the slow step is still the rate determining step and we're still going to use this step to find our rate law. But now we're going to have to take this guide into consideration from the first step. So let's write the rate determining or let's write the rate law for our first step. So remember, we're dealing with an elementary bimolecular reaction, the first step as well as a second step.