Question

Explain the concept of red and blue litmus paper with example
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Answer 1

Answer:

The main use of litmus is to test whether a solution is acidic or basic. Light-blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple.

Explanation:

litmus paper is an example of an organic indicator

Answer 2

Litmus is an acid-base indicator, which means it can tell you whether a substance is acidic or basic. Litmus sheets are available in two colours: red and blue. For the same solution, both papers exhibit the same colour.

Explanation: When a drop of acid is dropped on red litmus paper, the colour remains red, but when a drop of a base is added, the colour changes from red to blue. When we put a drop of acid on blue litmus paper, it becomes red, but when we put a drop of base on it, the colour of the blue litmus paper stays the same. The colour of the indicator does not change when a drop of neutral solution is added to either red or blue litmus paper.

The blue litmus paper was first immersed in a hydrochloric acid solution in the supplied question. The litmus would turn red as a result. It also returns to blue when immersed in sodium hydroxide solution.