Question

Explain, why a universal indicator is preferred to acid-base indicators.

Answer 1

Universal indicators are preferred to acid-base indicators because these give different colours in different P^H ranges. A solution containing a drop of universal indicator is matched against a standard colour to find the P^H of the solution.

PH	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14
Colour of universal inducator		Red		Pink		Yellow		Green		Blue		Indigo		Violet