What is phenolphthalein chemistry?
What is phenolphthalein chemistry?
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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. Fast Facts. Related Content. phenolphthalein.
What phenolphthalein means?
: a white or yellowish-white crystalline compound C20H14O4 used in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by acids and in medicine as a laxative.
What is the chemical name for phenolphthalein?
| IUPAC Name | 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1-one |
|---|---|
| Molecular Formula | C20H14O4 |
| Molar Mass | |
| InChI | InChI=1S/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22H |
| InChI Key | KJFMBFZCATUALV-UHFFFAOYSA-N |
What is phenolphthalein short answer?
Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as “HIn” or “phph” in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.
What is phenolphthalein definition Class 7?
(c) Phenolphthalein: Phenolphthalein is an indicator solution which turns colourless in the presence of acids. Therefore, in the presence of sulphuric acid, phenolphthalein turns colourless.
What is end point in titration?
end point: the point during a titration when an indicator shows that the amount of reactant necessary for a complete reaction has been added to a solution.
What is phenolphthalein and methyl orange?
When an acid is dissolved in water we get an acidic solution. Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.
What is phenolphthalein Class 7 short?
What is the chemical formula for phenolphthalein?
Phenolphthalein is a chemical compound with the formula C 20H 14O 4 and is often written as “HIn” or “phph” in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and red in basic solutions.
What is the purpose of phenolphthalein?
Phenolphthalein is a mild acid that can be used for medical and scientific purposes. When used in medicine, this compound is most commonly recognized as an ingredient in over-the-counter laxatives. In laboratory settings, it is typically used to test the acidity of other substances.
What are the hazards of phenolphthalein?
Phenolphthalein is an ingredient previously used in over-the-counter laxatives, but because of concerns of carcinogenicity, it is not currently approved for the US market. Additional health risks associated with phenolphthalein can include serious gastrointestinal disturbances as well as an irregular heartbeat.
What does Phenolphthalein test for?
The Phenolphthalein blood test is used to screen for the presence of the hemoglobin molecule. All blood has heme in it and even when blood evaporates on a surface or is cleaned up, the hemoglobin molecules may remain. Sometimes referred to as the Kastle-Meyer test, this blood test has been described as a viable forensic process since 1903.