TITRATION OF AN ACID WITH A BASE- PHENOLPHTHALEIN (1 of 2)<br />
Set-up With Burette<br />
0.1M sodium hydroxide solution is in buret.  Solution of vinegar (5% acidity), water &amp; phenolphthalein indicator is in Erlenmeyer flask.  As pH approaches 9, endpoint of titration is reached and phenolphthalein turns pink.