So step two is responsible for producing this product, namely this guy. And now these two guys, two moles of hydroxide finally react with two moles of hydronium to produce our four moles of water, the second product. So the second step is responsible for producing one of the products while the third step is responsible for producing the second type of product. Now let's go back to this step. Now, relative to the rates of these two steps, this is a very, very slow step and in fact these steps can be assumed to be instantaneous very quick. So what's the significance of this slow step?