Phenolphthalein is an indicator — a chemical which changes colour depending on whether it meets an acid or a base. It turns purple if it meets something basic, such as ammonia; it stays colourless if it meets an acid like vinegar or a neutral substancelike water. What is phenolphthalein ne...
In view of this feature, laboratory commonly uses it as a kind of acid and alkali titration indicator with the discoloration range of PH being around 8.2 to 10.0, turning from colorless to red. When the phenolphthalein reagent is dropped into water or neutral, acidic aqueous solution, there ...
indicator with the discoloration range of PH being around 8.2 to 10.0, turning from colorless to red. When the phenolphthalein reagent is dropped into water or neutral, acidic aqueous solution, there will be white turbidity. This is due to that the alcohol is easily soluble in water, so that...
When phenolphthalein is used as the indicator in a titration of an HCl solution with a solution ofNaOH, the indicator undergoes a colour change from colourless to poink at the end point of the tiration. This colour change occurs abruptly because ...
Add 50 to 100 cc. hot, neutral alcohol, and titrate with N/2, N/4 or N/10 sodium hydroxide depending on the fatty acid content, using phenolphthalein as indicator. FromProject Gutenberg Titrate the distillate with N/10 alkali, using phenolphthalein as an indicator. ...
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
Describe clearly why a single indicator solution is only useful for measuring pH over a rather narrow range. Use a specific indicator of solution (ex. Crystal Violet, Thymol Blue, Methyl Orange, Methyl Red, Neutral Red...) to illustrate arguments. ...
Phenolphthalein is crystal powder and almost insoluble in water.It is colorless in acidic and neutral solutions and purplish red in alkaline solutions. It is often used to detect acid and alkali. In addition, the main uses of phenolphthalein are as follows: (1) Pharmace...
a compound of [(C6H6OH)2C2O2C6.H4], pale yellow powder which is soluble in neutral or acidic solution almost colorless, pink to dark red in alkalic medium, but colorless in presence of large alkali. Used as indicator and dyes. By adding one oxygen, bridge to phenolphthalein gives an ...