Phenolphthalein is a color indicator used in acid/base titration. It has also been used as a laxative, but its over-the-counter uses had been withdrawn because of toxicological concerns over carcinogenicity. The metabolism of [ 14 C]-phenolphthalein was investigated in F344 rats and B6C3F1 ...
a white, crystalline compound, C 2 0 H 1 4 O 4 , used as an indicator in acid-base titration and as a laxative. Discover More Word History and Origins Origin ofphenolphthalein1 First recorded in 1870–75;phenol+phthalein Discover More ...
What is the function of the indicator phenolphthalein?Question:What is the function of the indicator phenolphthalein?Acid-Base Titrations:In an acid-base titration, we use an acid and a base to find the concentration of the unknown solution. A titrant, which is a solution of known concentration...
phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution's
(e)Phenolphthalein is an indicator and is represented by the formul a HIn.Phenolphthalein, HIn, is a weak acid.HInH++ In The K value for phenolphthalein is 5.0 × 10-10moldm-3 at 298 K. This indicator changes colour at a pH of approximately 8.8.[In-]Calculate the ratio n at pH ...
Phenolphthalein (Phthalin) is an acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic. 别名 酚酞, Phthalin, Phthalimetten, Euchessina 化学信息 分子量 318.32 分子式 C20H14O4 CAS No. 77-09...
Noun1.phenolphthalein- a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 ...
phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0. Phenolphthalein is a potent laxat...
美音[fi:nɔ:l'fθæli:n] ; 名词 酚酞 英语解释 a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 ...
: a white or yellowish white compound used as a laxative and as an acid-base indicator because its solution is brilliant red in alkalies and clear in acids Medical Definition phenolphthalein noun phe·nol·phtha·lein ˌfēn-ᵊl-ˈthal-ē-ən -ˈthal-ˌēn -ˈ...