On Dec 20 2009, 7:02*pm, "Paul E. Lehmann" >
wrote:
> No don't abandon the test. *It is really quite easy if you have a pH meter.
> The color change occurs when the pH reaches 8.2. *Simpley add the NaOH as
> you normally do and at the same time stir and watch your pH. *The end point
> occurs when the pH is 8.2. *I know, it is not real intuitive that 8.2 is
> the end point instead of 7.0 but 8.2 is the point at which the indicator
> indicates neutrality

It's not 7 because you're neutralizing weak acids (acetic, tartaric,
etc) with a strong base.