. “Acid-Base Indicator Test for Students | Easy Demo!”

Описание: In this video, we test phenolphthalein with sodium hydroxide (NaOH) and hydrochloric acid (HCl) to observe its colour-changing properties:

🔹 In NaOH (basic medium): Phenolphthalein turns pink due to ionisation.
🔹 When HCl is added: The solution becomes acidic, and the pink colour disappears.

This experiment beautifully demonstrates how indicators help identify acids and bases.