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词汇 litmus paper
释义

Definition of litmus paper in English:

litmus paper

noun
  • 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.

    Example sentencesExamples
    • A litmus paper can be used to find out whether the soil is acidic, alkaline or neutral.
    • Test pH with an inexpensive soil testing kit available at hardware and lawn and garden centers, or with litmus paper sold at drugstores.
    • A few weeks later, so did the litmus paper in one of his urine tests.
    • 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.
    • 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.
    • When adequately lavaged use litmus paper to ensure that eye pH is neutral immediately after the lavage is completed and again 10 minutes later.
    • ‘The litmus paper is still the litmus paper,’ he enunciated in the formal manner of the lecturer.
    • Blue litmus paper turns red in acidic solution, and red litmus paper turns blue in basic solution.
    • 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.
    • Acids are typically corrosive, sour to the taste, turn litmus paper red, react with some metals to liberate hydrogen, and neutralize bases.
    • The law, therefore, is unreliable sociological litmus paper.
    • Making litmus paper change colour was uninspiring and dissecting enormous rats was a lesson more steeped in butchery than anatomy.
    • 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.

Definition of litmus paper in US English:

litmus paper

nounˈlitməs ˌpāpər
  • 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.

    Example sentencesExamples
    • A litmus paper can be used to find out whether the soil is acidic, alkaline or neutral.
    • 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.
    • Blue litmus paper turns red in acidic solution, and red litmus paper turns blue in basic solution.
    • 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.
    • ‘The litmus paper is still the litmus paper,’ he enunciated in the formal manner of the lecturer.
    • The law, therefore, is unreliable sociological litmus paper.
    • A few weeks later, so did the litmus paper in one of his urine tests.
    • 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.
    • Test pH with an inexpensive soil testing kit available at hardware and lawn and garden centers, or with litmus paper sold at drugstores.
    • Acids are typically corrosive, sour to the taste, turn litmus paper red, react with some metals to liberate hydrogen, and neutralize bases.
    • Making litmus paper change colour was uninspiring and dissecting enormous rats was a lesson more steeped in butchery than anatomy.
    • 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.
    • When adequately lavaged use litmus paper to ensure that eye pH is neutral immediately after the lavage is completed and again 10 minutes later.
    • 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.
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