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
Phenolphthalein is a weak acid and is colorless in solution although its ion is pink. If hydrogen ions (H+, as found in an acid) were added to the pink solution, the equilibrium would switch, and the solution would becolorless. Adding hydroxide ions (OH-, as found in bases) will change...
(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 ...
finaltheIlin[or]finaltheIliihn[or]finalthaelin[or]finalthaeliihn phenolphthalein英英释义 n.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 ...
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 is often used as an indicator inacid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. ... It is a weak acid, which can lose H+ions in solution. Why is phenolphthalein used as an indicator?
acid–base indicator Phenolphthalein is another weak organic acid. It is not particularly water soluble, so we generally dissolve it in aqueous ethanol. The ethanol explains the pleasant, sweet smell of phenolphthalein solutions. Phenolphthalein is colourless and clear in acidic solutions, but imparts...
Solutions of salts, especially sodium salts, of acrylamidoalkanesulfonic acids in organic liquids such as dimethylformamide are prepared by reacting the acid with a metal salt of a weak acid (preferably a metal carbonate or bicarbonate), or a cation exchange resin in the metal salt form, in ...
Noun1.phenolphthalein- alaxativeusedinmanypreparationsundervarioustradenames;alsousedas anacid-baseindicatorintitrationsinvolvingweakacidsandstrongbasesbecauseit isbrilliantredathighalkalinityandcolorlessbelowpH 8 laxative- amildcathartic acid-base indicator- anindicatorthatchangescolorongoingfromacidictobasicsolutions...