Red litmus paper

Definition

Indicator paper that turns blue under alkaline conditions.

Used by Edexcel

Specification 9.4C · Paper 2

To test for it, dampen a piece of red litmus paper with a few drops of water. The paper should be damp rather than soaking wet.
Revise: Test for Ammonia

1
State both the reagent and the observation: damp red litmus paper turns blue.

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GCSE Chemistry · key term

Indicator paper that turns blue under alkaline conditions.

Used by Edexcel

Specification 9.4C · Paper 2

To test for it, dampen a piece of red litmus paper with a few drops of water. The paper should be damp rather than soaking wet.
Revise: Test for Ammonia

1
State both the reagent and the observation: damp red litmus paper turns blue.

Create a free account to read GCSE Chemistry revision notes for your exam board and track your progress.