Now when it comes to acid base titration curves, you'll hear the term equivalence point. Now the equivalence point is just a point of complete neutralization where the moles of acid equal the moles of base. Here we're going to say the equivalence point volume equation represents a simplified approach to solution stoichiometric calculations.

So in the past we've talked about doing stoichiometry and incorporating calculations dealing with molarity. We can bypass that by using this simplified version of the equivalence point volume formula. Here it represents MA⁢VA=MB⁢VB. Here MA equals the molarity of the acid, and VA equals the volume of the acid. So MB would be the molarity of the base, and VB would be the volume of the base.

Now what's important in terms of this equation is it helps to simplify solution stoichiometric calculations, but you still need to pay close attention to the type of acid and base that you have. Here we're going to say for diprotic, which means you have two acidic hydrogens, and for polyprotic acids, when you have more than two, the number of H+ ions will affect the overall concentration.

So for example, let's say we had 0.40 molar sulfuric acid. Sulfuric acid in itself has a total of 2 acidic H+ ions. Yes, I know that the first one is strong, but the second one is very weak. But here we're looking at the totality of the number of H+ ions within sulfuric acid, that being two. That means that the true concentration when it comes to the equivalence point would be H+ equals the concentration of the whole compound times the number of H+ ions, which is 2. So that gives us a true concentration of 0.80 molar.

Now for strong bases, we've done what we've always done. We've looked at the number of OH-, H-, O2-, and H2- ions. This gives us the true concentration of our strong base. So for example, we have 0.10 molar of barium hydroxide. It has two OH- ions within it. So the true concentration of OH- would be 0.10, which is the concentration of the entire compound, times 2, the number of OH- ions. So this would be 0.20 molar, right?

So keep in mind, if you're going to utilize this equivalence point volume formula, to keep an eye out for the number of H+ ions in our acid and also the number of our basic anions for the base. So that would be in the form of OH-, H-, O2-, and H2- respectively.