pH Scale
The universal Indicator was invented in 1923 by Yamada
Universal Indicator Blue was created in 1992.
Universal Indicator Red was created in 1993.
Universal Indicator Green was created in 1995.
Universal Indicator Yellow was created in 1993.
Universal indicator is just that - an indicator. It is not intended as an accurate measurement system.
Alkalis turn universal indicator blue or purple.
Green is the color that universal indicator turns to when it is neutral.
The universal indicator turns red in acidic solutions.
Water is NOT Universal Indicator. Water is often referred to as a Universal Solvent as a large number of substances are soluble in it. Universal Indicator is a chemical agent that can be used to test the pH of a liquid.
A universal indicator is a pH indicator that exhibits a gradual change in color to indicate the acidity or alkalinity of a solution. It can show a range of pH levels, typically from 0 to 14, with distinct colors corresponding to different pH values. Universal indicators are commonly used in laboratories and educational settings for pH testing.
pH of ammonia is around 11-12. Hence when you put it in a universal indicator, you get purple color.