And if it's not a good enough acid, it will not be very likely to produce this hydroxide ion. And as we'll see in just a moment, it's the hydroxide ion that will be much more likely to act as a nucleophile and attack the carbon dioxide than the water. Now, what this binding does is because of this association, this reaction, the dissociation of that H plus ion to form the hydroxide and the H plus greatly increases. And so the PKA value decreases. So because of this interaction between the zinc atom and the water, we basically decrease the PTA value of this reaction. And by decreasing the PTA value, we essentially make it much more likely that the water will dissociate and produce that hydroxide.