Question

What is a litmus solution? How is it obtained?

Answer 1

Litmus solution

• Litmus solution is a naturally extracted purple dye, which is used as an indicator to distinguish between acids and bases.
• The dye is extracted from lichens, which belong to thallophytes.

Preparation of Litmus solution

• Litmus solution is prepared by grinding the lichens and then water is added to obtain the solution.
• Litmus paper is prepared by dipping the wood cellulose into the litmus solution.
• The litmus paper is a convenient source to check if the solution is acidic or basic in nature.