酚酞 (fēn tài) — phenolphthalein

Definição

A chemical indicator (化学指示剂) used in titrations: colorless in acid, turning pink in basic solutions.

noun
phenolphthalein

Exemplos

  • 酚酞
    fēn tài Shì yì zhǒng cháng yòng de zhǐ shì jì.
    Phenolphthalein is a commonly used indicator.
  • 酚酞
    Zài suān xìng róng yè zhōng, fēn tài shì wú sè de.
    In acidic solutions, phenolphthalein is colorless.
  • 酚酞
    fēn tài Yù dào jiǎn huì biàn chéng fěn hóng sè.
    Phenolphthalein turns pink when it encounters alkali.

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