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  2. Red cabbage - Wikipedia

    en.wikipedia.org/wiki/Red_cabbage

    The juice of red cabbage can be used as a homemade pH indicator, turning red in acid and green/yellow in basic solutions. When cooking, red cabbage will normally turn blue; adding vinegar or acidic fruit to the pot is necessary to retain the cabbage's red colour. [4] Red cabbage needs well-fertilized soil and sufficient humidity to grow.

  3. Anthocyanin - Wikipedia

    en.wikipedia.org/wiki/Anthocyanin

    Anthocyanins may be used as pH indicators because their color changes with pH; they are red or pink in acidic solutions (pH < 7), purple in neutral solutions (pH ≈ 7), greenish-yellow in alkaline solutions (pH > 7), and colorless in very alkaline solutions, where the pigment is completely reduced.

  4. Cyanidin - Wikipedia

    en.wikipedia.org/wiki/Cyanidin

    It can also be found in other fruits such as apples and plums, and in red cabbage and red onion. It has a characteristic reddish-purple color, though this can change with pH; solutions of the compound are red at pH < 3, violet at pH 7-8, and blue at pH > 11. In certain fruits, the highest concentrations of cyanidin are found in the seeds and skin.

  5. pH indicator - Wikipedia

    en.wikipedia.org/wiki/PH_indicator

    Extracting anthocyanins from household plants, especially red cabbage, to form a crude pH indicator is a popular introductory chemistry demonstration. Litmus , used by alchemists in the Middle Ages and still readily available, is a naturally occurring pH indicator made from a mixture of lichen species, particularly Roccella tinctoria .

  6. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    Plants contain pH-dependent pigments that can be used as pH indicators, such as those found in hibiscus, red cabbage (anthocyanin), and grapes . Citrus fruits have acidic juice primarily due to the presence of citric acid, while other carboxylic acids can be found in various living systems.

  7. Angelina Jolie Gets Asked 'the Most Insane Question.' Here's ...

    www.aol.com/angelina-jolie-gets-asked-most...

    Angelina Jolie balked at a question regarding whether there should be a biopic about her life.. When Jolie, 49, and her Maria director Pablo Larraín spoke with the U.K.'s The Times to promote ...

  8. Invisible ink - Wikipedia

    en.wikipedia.org/wiki/Invisible_ink

    Phenolphthalein, commonly used as a pH indicator, turns pink in the presence of a base such as ammonia fumes or sodium carbonate. Vinegar, is revealed by red cabbage water [12] Vinegar contains acetic acid that affects the pH indicator in red cabbage water. Vinegar may also be developed by heat. Ammonia, developed by red cabbage water.

  9. Lady Gaga's Engagement Ring Is Even Bigger Than We ... - AOL

    www.aol.com/lifestyle/lady-gagas-engagement-ring...

    Lady Gaga is showing off quite the sparkler on Carpool Karaoke!. The singer, 38, revealed her giant-sized engagement ring while appearing in Apple TV+ and Apple Music’s Christmas special of A ...