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Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols in experiments. It is a weak acid, which can lose H + ions in solution. The nonionized phenolphthalein molecule is colorless and the double deprotonated phenolphthalein ion is fuchsia. Further proton loss in higher pH occurs slowly and leads to a colorless form.
phph, an abbreviation for the pH indicator phenolphthalein PhPh, chemical shorthand notation for two phenyl groups attached to each other; see biphenyl Topics referred to by the same term
Phenols are more acidic than typical alcohols. The acidity of the hydroxyl group in phenols is commonly intermediate between that of aliphatic alcohols and carboxylic acids (their pK a is usually between 10 and 12).
Abbreviations are used in the list as follows: INN = International Nonproprietary Name; ... phenolphthalein ; phenomorphan ; phenoperidine ;
Chemical structure of phenolphthalein, a common phthalein dye. Phthalein dyes are a class of dyes mainly used as pH indicators, due to their ability to change colors depending on pH. [1] They are formed by the reaction of phthalic anhydride with various phenols. They are a subclass of triarylmethane dyes. Common phthalein dyes include ...
Long-term use of castor oil may result in loss of fluid, electrolytes, and nutrients. ... Phenolphthalein: Triphenylmethane: colon: 8 hours Bisacodyl : Triphenylmethane:
For example, phenolphthalein is a pH indicator whose structure changes as pH changes as shown in the following table: Structure pH 0-8.2: 8.2-12 Conditions
Solution: The main components of a universal indicator, in the form of a solution, are thymol blue, methyl red, bromothymol blue, and phenolphthalein. This mixture is important because each component loses or gains protons depending upon the acidity or alkalinity of the solution being tested. It is beneficial to use this type of universal ...