Why the colour of litmus paper changes??

Open in App

Solution

Red litmus contains a weak diprotic acid. When it is exposed to a basic compound, the hydrogen ions react with the added base. The conjugated base, formed from the litmus acid, has a blue color, so the wet red litmus paper turns blue in alkaline solution.

Suggest Corrections

Similar questions

Why does dry HCl gas not change the colour of the dry litmus paper?

Dry $H C l$ gas changes the colour of the litmus paper.

Why HCl gas is unable to change the colour of a dry blue litmus paper ? What happens if the paper is moistened ?

What makes litmus paper to change its colour?

Join BYJU'S Learning Program