enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Red cabbage - Wikipedia

    en.wikipedia.org/wiki/Red_cabbage

    A gradient of red cabbage extract pH indicator from acidic solution on the left to basic on the right. Red cabbage contains an anthocyanin-based dye that can be used as a pH indicator. It is red, pink, or magenta in acids (pH < 7), purple in neutral solutions (pH ≈7), and ranges from blue to green to yellow in alkaline solutions (pH > 7). [7]

  3. 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.

  4. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    Relation between pH and pOH. Red represents the acidic region. Blue represents the basic region. pOH is sometimes used as a measure of the concentration of hydroxide ions, OH −. By definition, pOH is the negative logarithm (to the base 10) of the hydroxide ion concentration (mol/L). pOH values can be derived from pH measurements and vice-versa.

  5. 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.

  6. 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.

  7. Could a Boost of Vitamin D Ease Your Menopause Symptoms? - AOL

    www.aol.com/could-boost-vitamin-d-ease-185100453...

    The majority of menopausal women are deficient. Experts weigh in on the benefits of taking a vitamin D supplement in menopause.

  8. Texas sues New York doctor accused of posting abortion pills

    www.aol.com/texas-sues-york-doctor-accused...

    Texas has sued a New York doctor for allegedly prescribing abortion pills to a Dallas-area woman, launching the first known legal challenge of its kind, which will test what happens when two ...

  9. Peter J. Stang - Wikipedia

    en.wikipedia.org/wiki/Peter_J._Stang

    At home, he made black gunpowder from ingredients at the drugstore, and developed a pH indicator from the juice of red cabbage that his mother cooked, and sold to his "fellow chemists". [ 3 ] In 1956, when Stang was in the middle of his sophomore year in high school, he and his family fled the Soviet invasion of Hungary and immigrated to ...