And it's the hydroxide that will be more likely to actually react with the carbon of the carbon dioxide. So based on experimental data, we see that the binding of the zinc atom to water lowers the PKA value of water from 15.7 to 7.0. And this makes water much more likely to give up its hydrogen ion and become a hydroxide ion. And why is that useful? Well, it's useful because hydroxide ions are very, very potent nucleophiles. And so what that means is, once we form that hydroxide, it'll be much more likely to actually attack the carbon of that carbon dioxide to ultimately form that bicarbonate ion.