Question

identify any five natural substances like turmeric and explain in detail how they can be used as acid base indicators.

Answer 1

Turmeric is used as a natural indicator. It is added to the solution to determine its acidity and basicity. The turmeric is acidic in nature and it is yellow in color. When turmeric paste is added to the acidic solution, it remains unchanged. The color in the acidic solution is yellow. When turmeric paste is added to the basic solution the yellow color changes to red color due to the neutralization reaction.

Answer 2

Onion extract,litmus,clove oil, vanilla essence,

red cabbage