State three uses of acid base titrations

I can think of these three.  

Explanation:

1. To determine the concentration of an acid or base.

If you exactly neutralize an acid or base by titrating it with a standard solution, you can calculate its concentration  

2. To determine the pKₐ or pKb of an acid or base

If you draw a titration curve, the pK of the sample is the pH when you have added half the volume of titrant needed to reach the end point.

3. To follow the rate of a reaction

If a reaction produces an acid or base, you can titrate the product as it is formed. The volume of titrant will be a measure of the rate of the reaction.