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Phenolphthalein (/ f ɛ ˈ n ɒ l (f) θ ə l iː n / [citation needed] feh-NOL(F)-thə-leen) is a chemical compound with the formula C 20 H 14 O 4 and is often written as "HIn", "HPh", "phph" or simply "Ph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations.
pH indicators: a graphic view. A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually or spectroscopically by changes in absorption and/or emission properties. [1] Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O ...
Laurence Lewin (20 May 1944 – 12 November 2008) was an English-born Canadian accountant, computer programmer and entrepreneur, who was one of the co-founders of lingerie firm La Senza. [ 1 ] [ 2 ] Lewin was working at clothing retailer Suzy Shier , in 1990, when he co-founded La Senza, a lingerie firm that was eventually licensed to 700 ...
This category contains articles about pH indicators: chemical compounds which change colour or fluorescence in response to changes in pH Wikimedia Commons has media related to PH indicators . Subcategories
A roll of universal indicator paper Colors of universal indicator. A universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. A universal indicator can be in paper form or present in a form of a ...
No description. Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status indicator_name indicator_name no description Unknown optional low_pH low_pH no description Unknown optional high_pH high_pH no description Unknown optional low_pH_color low_pH_color no description Unknown optional low_pH_text low_pH_text no ...
The La Senza brand is currently owned by Regent which operates and owns La Senza stores in Canada and the United States and uses a franchise model for the operation of stores outside Canada and the United States. [4] At its peak, La Senza was the dominant lingerie retailer in Canada, with 322 corporate-owned stores across the country in January ...
The pH level of food influences its flavor, texture, and shelf life. [33] Acidic foods, such as citrus fruits, tomatoes, and vinegar, typically have a pH below 4.6 [34] with sharp and tangy taste, while basic foods taste bitter or soapy. [35] Maintaining the appropriate pH in foods is essential for preventing the growth of harmful ...