Phenolphthalein is a common pH indicator used in acid-base chemistry. But the history behind this compound is stranger than fiction! It was originally developed as a synthetic dye to compete with mauvine in the late 19th century. It was never used as a dye due to its pH sensitivity, which led to widespread use as a pH indicator. Phenolphthalein will change from colorless to pink once the pH is above 8, making it an ideal indicator for acid-base titrations. This color changing property also led t

Do you know the reagent & Experiment? 🧪 Chemistry Behind the Reaction: This experiment uses an acid–base indicator, most commonly phenolphthalein. Phenolphthalein is colorless in acidic solutions (pH 8.2) When you pour a clear base (like sodium hydroxide) into the beaker containing the indicator, the pH rises — the liquid turns bright pink. Then, when you add an acidic solution (like hydrochloric acid), the pH drops again — the color fades back to clear. So, the beautiful color change happens b

Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and red in basic solutions. | UNILAD Tech