Name the source from which litmus solution is obtained. What is the use of this solution?

Litmus solution is extracted from lichens, particularly species like Roccella tinctoria and Lecanora tartarea, known for containing dyes used in producing this solution.

Uses of Litmus Solution:
1. pH Indicator: Litmus solution serves as a widely used pH indicator. It changes color in response to acids or bases. Red litmus turns blue in the presence of a base (alkaline solution), while blue litmus turns red in the presence of an acid.

2. Laboratory Testing: In laboratories, it’s utilized for quick testing of a substance’s acidity or alkalinity by observing the color change when litmus paper is dipped into the solution being tested.

3. Educational Tool: Commonly used in educational settings to demonstrate acid-base concepts, helping students grasp pH and chemical reactions based on color changes.

4. Industrial Quality Control: Litmus solution finds use in various industries, especially in quality control processes. It’s crucial in industries like food production and water treatment to maintain specific pH levels.

In summary, derived from lichens, litmus solution acts as a versatile pH indicator, facilitating identification of substances’ acidic or basic nature in scientific, educational, and industrial realms.