Then I would have to multiply this guy by two to find this. But since it's one to one, they're equal. Okay, so now we have my equilibrium concentration of my conjugate base and my conjugate acid. And I have to find my equilibrium concentration of my initial acid. So initially at 0.3 and at equilibrium, that means I have to have a little bit less than 0.03
because a little bit of it is dissociated into this guy. But how much less is exactly?