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Paper stained with litmus which is used to indicate the acidity or alkalinity of a substance. Blue litmus paper turns red under acid conditions, and red litmus paper turns blue under alkaline conditions.
- ‘A litmus paper can be used to find out whether the soil is acidic, alkaline or neutral.’
- ‘‘The litmus paper is still the litmus paper,’ he enunciated in the formal manner of the lecturer.’
- ‘Consider a case in which the law ‘all blue litmus paper turns red in acid solution’ is tested by placing a piece of paper in a liquid.’
- ‘A few weeks later, so did the litmus paper in one of his urine tests.’
- ‘Making litmus paper change colour was uninspiring and dissecting enormous rats was a lesson more steeped in butchery than anatomy.’
- ‘Contrast the two general statements: that blue litmus paper dipped in acid turns red; and that all the coins in my pocket are pound coins.’
- ‘We might, for example, give up the claim that this liquid is an acid, or the claim that this is a piece of litmus paper, or the claim we are not hallucinating, etc.’
- ‘Test pH with an inexpensive soil testing kit available at hardware and lawn and garden centers, or with litmus paper sold at drugstores.’
- ‘When adequately lavaged use litmus paper to ensure that eye pH is neutral immediately after the lavage is completed and again 10 minutes later.’
- ‘Acids are typically corrosive, sour to the taste, turn litmus paper red, react with some metals to liberate hydrogen, and neutralize bases.’
- ‘Blue litmus paper turns red in acidic solution, and red litmus paper turns blue in basic solution.’
- ‘Earth's greatest scientists work around the clock to avert disaster, finally resolving the problem with the careful use of test tubes, Bunsen burners, and litmus paper.’
- ‘The law, therefore, is unreliable sociological litmus paper.’
- ‘To test pH, you can get a digital meter for about $50, or you can get litmus paper or a dropper kit like the ones used for pools.’
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