what is the phenolphthalein endpoint
Phenolphthalein is often used as an indicator in acidâbase titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments.It is a weak acid, which can lose H + ions in solution. The phenolphthalein molecule is colorless, and the phenolphthalein ion is pink.When a base is added to the phenolphthalein, the molecule â ions equilibrium shifts to the right, leading to more ionization as H + ions are removed.This is predicted by Le Chatelier's principle.henolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments. It is a weak acid, which can lose H + ions in solution. The phenolphthalein molecule is colorless, and the phenolphthalein ion is pink.