Litmus

Summary: At school, you might use litmus indicator. Litmus is a solution of dyes from lichens. Paper can be soaked in litmus solution to make litmus paper. - Red litmus turns blue in alkaline solutions. - Blue litmus turns red in acidic solutions (see. Tags: science student-book-7 chemistry Created: 2026-05-21 Last Updated: 2026-05-21

Litmus

At school, you might use litmus indicator. Litmus is a solution of dyes from lichens. Paper can be soaked in litmus solution to make litmus paper. - Red litmus turns blue in alkaline solutions. - Blue litmus turns red in acidic solutions (see.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Chemistry/Acids and Alkalis/4.2 Indicators and pH.md), Chemistry section.