A drop of red cabbage juice turns bright red in lemon juice and green in soapy water. A universal indicator strip cycles through the colours of a rainbow as it moves from strong acid to strong base. These colour changes are not magic they are the pH scale made visible. The pH scale is chemistry most powerful single measurement: one number that tells you whether a solution is acidic, neutral, or alkaline, and by exactly how much. Today you master Indicators, the pH Scale, and the Uses of pH Measurement precision in a single number!
16/05/2026, 13:47:43
