Red color in acidic solutions and blue color in basic solutions.
Red and blue are the two colors of litmus paper. Litmus paper is used to test the pH of a substance.
Litmus paper turns blue in basic solution.
Acids can turn different colors in indicators like litmus paper. They turn red in litmus paper, yellow in phenolphthalein, and orange in methyl orange.
The colors of litmus is different; this depends on the pH.
Blue litmus paper turns red under acidic conditions, red litmus paper turns blue under basic conditions, and both colors remain unchanged under neutral conditions.
Litmus paper turns red in acidic solutions and blue in alkaline solutions.
This is called Litmus paper.
Litmus paper pH paper
The main use of litmus is to test whether a solution is acidic or alkaline. Wet litmus paper can also be used to test water-soluble gases; the gas dissolves in the water and the resulting solution colors the litmus paper. For instance, ammonia gas, which is alkaline, colors the red litmus paper blue. Chemical reactions other than acid-base reaction can also cause a color-change to litmus paper. For instance, chlorine gas turns blue litmus paper white - the litmus paper is bleached.[5] This reaction is irreversible and therefore the litmus is not acting as an indicator in this situation
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Red litmus paper is used to test for acids. If the red litmus paper turns blue when dipped in a substance, it indicates the presence of an acid.
Litmus paper can turn red in acidic solutions and blue in basic solutions. These color changes occur due to the pH-sensitive dyes in the paper reacting with the hydrogen or hydroxide ions present in the solution.