# What is the formula of boric acid, and how do we use it in an acid-base titration?

##### 1 Answer
Aug 2, 2017

The formula for boric acid is ${H}_{3} B {O}_{3}$.........

#### Explanation:

And we could represent its ionization as......

${H}_{3} B {O}_{3} + {H}_{2} O r i g h t \le f t h a r p \infty n s {H}_{2} B {O}_{3}^{-} + {H}_{2} O$

${K}_{a} = 5.75 \times {10}^{- 10}$........and thus a second ionization would be unlikely. In fact, when we titrate boric acid, we often add excess mannitol, (a sugar), to bind to the acid, and this species gives a better endpoint.....