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 It has also been used as a laxative, but its over-the-counter uses had been withdrawn because of toxicological concerns over carcinogenicity.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 ...
Phenolphthalein is colorless in the solution of pH below 8.5, become red at pH higher than 9. Upon excess amount of alkali and no color, the color process is as follows: Phenolphthalein, when used as acid-alkali titration indicator, is generally used at a concentration of 1% concentration. ...
Phenolphthalein is colorless in the solution of pH below 8.5, become red at pH higher than 9. Upon excess amount of alkali and no color, the color process is as follows:Phenolphthalein, when used as acid-alkali titration indicator, is generally used at a concentration of 1% concentration. 1...
Phenolphthalein is a type of internal indicator, which belongs to the group of dyes which is known as phthalein. It is often used as an indicator in the acid-base titration, because of itscolor changing properties with respect to change in pH of the solution. Chemistry - 3Sec - Phenolphth...
Noun1.phenolphthalein- alaxativeusedinmanypreparationsundervarioustradenames;alsousedas anacid-baseindicatorintitrationsinvolvingweakacidsandstrongbasesbecauseit isbrilliantredathighalkalinityandcolorlessbelowpH 8 laxative- amildcathartic acid-base indicator- anindicatorthatchangescolorongoingfromacidictobasicsolutions...
What is the Difference Between an Acid and a Base? Discussion Comments Byanon310850— On Dec 27, 2012 Is it the same exact powder used in laxatives as in the laboratory? Or are there ingredients added for lab use? All The Science, in your inbox ...
Acid-base indicator: Indicators are substances which changes color depending on its pH environment. The abrupt color change of the indicator marks the end point of the titration. Some of the indicators commonly used in the laboratory are phenolphthalein, methyl orange, cresol red, etc. The pH at...
However, phenolphthalein is a large, organic acid, and its structure changes, depending on whether its neutralized, or not -- and its color changes, depending on its structure. But acid-base neutralization only happens in water. So you have the system, use a small amount of alcoholic ...
Name:Phenolphthalein,CAS:77-09-8.Use:Used as an acid-base indicator stimulant laxative for the treatment of constipation.Buy Phenolphthalein.Molecular Fomula:C20H14O4,Molar Mass:318.32,Density:1.27 g/cm3 at 32 °C,Melting Point:261-263 °C (lit.),Boling
eg. titrating NaOH with HCl. Since both are strong acid/base, then the pH of neutralisation is 7. This means the indicator I use should exhibit a colour change when the pH of my solution is in the vincity of 7. Logged "Say you're in a [chemical] plant and there's a snake on ...