HA ↔ H+ + A- Phenolphthalein is typically used in this demo because its change from colorless to bright pink is easy to see in large lecture halls, but universal indicator could also be used.

Do you know what happens when sodium is placed in water with phenolphthalein (pH indicator)? See the colorful chemical reaction. This video is the first of Pesquisa FAPESP’s special series on ...

For example, the salt copper(II) sulfate can be prepared from the reaction of copper(II ... Add 2 drops of phenolphthalein indicator to the conical flask (it should go pink).