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? Well, the initial amount of vitonic acid minus final amount of conjugate base. So this guy in molar minus this guy in molar will give me the amount of vitamin acid left over. So 0.3 the amount I began with minus 3.116 times ten to negative four.