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  1. ChemicalBook
    https://www.chemicalbook.com/ChemicalPr…

    Phenolphthalein | 77-09-8 - ChemicalBook

    2024年11月19日 · Phenolphthalein is colourless and clear in acidic solutions, but imparts an intense puce pink colour in alkaline solutions of higher pH, with …

    • Boiling point: 417.49°C (rough estimate)
    • Melting point: 261-263 °C (lit.)
    • Density: 1.27 g/cm3 at 32 °C
    • refractive index: 1.5400 (estimate)

  2. Phenolphthalein Pink的图片

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  3. cdquestions.com
    https://cdquestions.com/exams/questions/which...

    Which indicator is used in the titration of sodium hydroxide …

    标记:
    Phenolphthalein
    Acid
  4. ChemicalBook
    https://www.chemicalbook.com/CAS_77-09-8.htm

    77-09-8 | CAS数据库 - ChemicalBook

  6. colorbox.com.vn
    https://colorbox.com.vn/what-color-is...

    What Color is Phenolphthalein When the Solution is Acidic?

  7. colorbox.com.vn
    https://colorbox.com.vn/what-color-is-phenolphthalein-in-acid

    What Color is Phenolphthalein in Acid? - Color Box Hà Nội

    标记:
    Phenolphthalein
    Acid
  8. fundootutor.com
    https://fundootutor.com/syllabus/ib-myp-5...

    Acids and Bases in Action: What Titrations Reveal About Hidden ...

  9. 其他用户还问了以下问题
    What color is phenolphthalein?
    Phenolphthalein, in alkaline solution, has its colorless lactone ring open to form quinone structure with the color exhibiting red. Upon coming across strong alkali, phenolphthalein can be converted into colorless carboxylate. Its color range is pH 7.0 (colorless) ~ 10.0 (red).

    Phenolphthalein | 77-09-8

    chemicalbook.com
    Is phenolphthalein a chromophore?
    Phenolphthalein is colourless and clear in acidic solutions, but imparts an intense puce pink colour in alkaline solutions of higher pH, with λ (max) = 552 nm. The coloured form of phenolphthalein contains a quinone moiety; in fact, any chromophore based on a quinone has a red colour.

    Phenolphthalein | 77-09-8

    chemicalbook.com
    Does phenolphthalein make urine turn pink?
    Phenolphthalein makes alkaline urine or feces turn pink. This product is a commonly used acid indicator with the range of color change between pH 8.2 (colorless) to 10.0 (red). Phenolphthalein is also a drug, can be used as a laxative, acting on the colon for the treatment of constipation.

    Phenolphthalein | 77-09-8

    chemicalbook.com
    Is phenolphthalein water soluble?
    It is not particularly water soluble, so we generally dissolve it in aqueous ethanol. The ethanol explains the pleasant, sweet smell of phenolphthalein solutions. Phenolphthalein is colourless and clear in acidic solutions, but imparts an intense puce pink colour in alkaline solutions of higher pH, with λ (max) = 552 nm.

    Phenolphthalein | 77-09-8

    chemicalbook.com
    Does phenolphthalein have a quinone moiety?
    The coloured form of phenolphthalein contains a quinone moiety; in fact, any chromophore based on a quinone has a red colour. But if a solution is prepared at pH 7 (e.g. as determined with a pH meter), we find the phenolphthalein indicator is still colourless, and the pink colour only appears when the pH reaches 8.2.

    Phenolphthalein | 77-09-8

    chemicalbook.com
    Can phenolphthalein be converted into colorless carboxylate?
    Upon coming across strong alkali, phenolphthalein can be converted into colorless carboxylate. Its color range is pH 7.0 (colorless) ~ 10.0 (red). The test solution was prepared by dissolving 1 g of 90% ethanol per liter of ethanol. Phenolphthalein is colorless in the solution of pH below 8.5, become red at pH higher than 9.

    Phenolphthalein | 77-09-8

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  10. pdfyar.com
    https://pdfyar.com/what-are-different-chemical...

    What are Different Chemical Tests on Concrete Structures?

    标记:
    Phenolphthalein
    Concrete
  11. bartleby
    https://www.bartleby.com/docs/chemistry/22412116

    Copy of Module Ten Science Journal Download_Amiya Roberts

    标记:
    Phenolphthalein
    Roberts County
  12. Knords Learning
    https://knordslearning.com/pyqs-ch-2-acids-bases-and-salts

    PYQs (Ch 2: Acids, Bases and Salts) - Knords Learning

    标记:
    Acid
    Salt
  13. ChemicalBook
    https://www.chemicalbook.com/msds/Phenolphthalein.htm

    Phenolphthalein - Safety Data Sheet - ChemicalBook

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