[chenbot]

So we mix .125 molar NaOH with 25mL of an unknown weak acid.

We measured the pH at various points and made a titration curve.

We have to find the Ka of the acid, the concentration of the acid, and what acid it is.

I know to find Ka you have to find the volume at the equivalence point, half it, and do the 10^whatever I got.

My question is: How do I know at what pH is the equivalence point?

I know the solution will be slightly basic because of the strong conjugate base that's left.

[Borek]

Draw titration curve, end point is where the inflection point is, it is not hard to find it on the plot.