Detecting Acids and Alkalis

example

Process of identification of acids and bases through litmus paper

if a solution turns red litmus paper blue, it indicates that it is basic.
if a solution turns blue litmus paper red, it indicates that it is acidic.

law

Process of identification of acids and bases through litmus paper

if a solution turns red litmus paper blue, it indicates that it is basic.
if a solution turns blue litmus paper red, it indicates that it is acidic.

definition

Natural Indicators

Indicators obtained from natural sources are called 'Natural Indicators'. The colour of a natural acid-base indicator depends on pH. One of the most well-known effects of natural indicators in plants occurs in the hydrangea or snowball plant. Hydrangea flowers are blue when grown in acidic soils and pink or red in basic soils.
Other common examples of Natural indicators include Turmeric, Beetroot juice etc.