Titration method between an acid and an alkali using phenolpthalein as the indicator.

Neutralisation is the reaction between an acid and a base to form salt and water:

Acid  +  Base  --->  Salt  +  Water

Or in other words, the hydrogen ions, H+ in the acid react with the hydroxide ions, OH- in the alkali to form water:

H+  +  OH-  --->  H2O

Acid-Base Titration method used to determine the volume of an acid required to neutralise a fixed volume of an alkali with the help of acid-base indicator. The commonly used indicators are phenolpthalein, methyl orange and universal indicator.

If you want more information on this experiment, please click here: http://n2.nabble.com/Acid-Bases-Neutralisation-Reaction-Using-Titration-Method-td4421025.html#a4421025

REMARKS: Interesting to know the colors of the indicators in different conditions.