So, if we raise both of these to the power of ten, or actually if we do this, we see that the log will basically cancel out. And so, all we get is this concentration of the hydrogen ion is equal to the ratio of these two guys. And so, we see that the negatives cancel and the logs cancel and we're simply left with this relationship. So, the concentration of our hydrogen ion, this is equal to the product of the concentration of the H plus ion and the a divided by the concentration of ha. So, the H plus appears on both sides. And so, we can cancel that out.