What does exactally happen with litmus paper when it is being dropped in either base or acid to change its colour
What does exactally happen with litmus paper when it is being dropped in either base or acid to change its colour
The main use of litmus is to test whether a solution is acidic or basic. Wet litmus paper can also be used to test for water-soluble gases that affect acidity or alkalinity; the gas dissolves in the water and the resulting solution colors the litmus paper. For instance,ammonia gas, which is alkaline, turn the red litmus paper blue.
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.[1] Litmus can also be prepared as anaqueous solution that functions similarly. Under acidic conditions, the solution is red, and under basic conditions, the solution is blue.
Litmus (pH indicator) below pH 4.5 above pH 8.3 4.5 ⇌ 8.3
Chemical reactions other than acid-base can also cause a color change to litmus paper. For instance, chlorine gas turns blue litmus paper white – the litmus dye is bleached,because of presence of hypochlorite ions. This reaction is irreversible, so the litmus is not acting as an indicator in this situation
The main use of litmus is to test whether a solution is acidic or basic. Wet litmus paper can also be used to test for water-soluble gases that affect acidity or alkalinity; the gas dissolves in the water and the resulting solution colors the litmus paper. For instance,ammonia gas, which is alkaline, turn the red litmus paper blue.
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.[1] Litmus can also be prepared as anaqueous solution that functions similarly. Under acidic conditions, the solution is red, and under basic conditions, the solution is blue.
| Litmus (pH indicator) | ||
| below pH 4.5 | above pH 8.3 | |
| 4.5 | ⇌ | 8.3 |
Chemical reactions other than acid-base can also cause a color change to litmus paper. For instance, chlorine gas turns blue litmus paper white – the litmus dye is bleached,because of presence of hypochlorite ions. This reaction is irreversible, so the litmus is not acting as an indicator in this situation
