0
There are a lot of indicators around. Choosing which one to use depends on what you're analyzing for, what pH the endpoint happens at, what kind of reaction is happening in the flask, etc.
Some common ones are Methyl Orange, Methyl Red, Starch, Bromphenol Blue; the list goes on.
Wiki User
∙ 16y ago
Wiki User
∙ 13y agoUsually in titrations involving amines as the titrator or titrant. Phenolpthalein changes colour at around pH 9 which is commonly the pH at which an amine neutralises. You usually use it when you titrate an acid with an amine - that is adding an amine to an acid because the colour change from clear to pink/purple is easier to determine.
Wiki User
∙ 12y agoIt changes color in the presence of acids and bases. So it can be used to determine whether a substance is acidic or basic. It can be used in titrations to determine the actual concentration of the substance being investigated. According to Wikipedia, when the pH is less than zero, phenolphthalein it will turn orange; when the pH is 0-8.2, it is colorless; and when the pH is 8.2-12.0 it is pink to fuschia; and when the pH is greater than 12.0 is is colorless.
Wiki User
∙ 16y agoA solution of phenolphthalein remains colourless in acids or neutral liquids, but turns bright reddish/pink in alkalis.
Wiki User
∙ 11y agos
Add your answer:
Earn +20 pts
Why is phenolphthalein indicator used?
Phenolphthalein is used as an indicator because the color of the solution is changed according to pH.
What indicator is used in the preparation of sodium chloride?
An indicator is not necessary; but if you want phenolphthalein is colorless at pH=7.
What is the action of sodium hydroxide on the colour of phenolphthalein?
Phenolphthalein is pink in basic solutions.Phenolphthalein is used as an indicator in volumetry - acid-base titration.
What is the purpose of phenolpthalein?
Phenolphtalein is used as indicator for titration in chemistry. Also as a pH indicator: pink in basic solutions and colorless in acidic solutions. Phenolphatelein can be used to check blood in forensic problems or as a component of some inks.
What is phenolphthalein?
it is a agar medium for Microbiology containing phenolphthalein biphosphate. It is used in Petri plates and detects the phosphatase character of microbial colonies but requires final addition of alkali to color the phenolphatlein and the color rapidly fades.
Why is phenolphthalein indicator used?
Phenolphthalein is used as an indicator because the color of the solution is changed according to pH.
Why is phenolphthalein used in the titration experiment?
it is used as an acid-base indicator
Why is phenolphthalein is used in titration experiment?
it is used as an acid-base indicator
Why phenolphthalein used in titration?
it acts as acid base indicator
What are different types of indicator used in titration?
phenolphthalein is one i know.
Why is phenolphthalein indicator used in the titration of oxalic acid against sodium hydroxide?
Yes. Phenolphthalein can be used as an indicator for the titration of a weak acid (oxalic acid) against strong base (sodium hydroxide).
How much phenolphthalein indicator should be used?
A few drops of any indicator is generally enough to get a reading.
What indicator is used in the preparation of sodium chloride?
An indicator is not necessary; but if you want phenolphthalein is colorless at pH=7.
What is the colour of zinc ions mixed with ammonia in phenolphthalein indicator?
The phenolphthalein indicator is pink in basic solutions.
What is the action of sodium hydroxide on the colour of phenolphthalein?
Phenolphthalein is pink in basic solutions.Phenolphthalein is used as an indicator in volumetry - acid-base titration.
Indicators used in acid base titration?
It depends on the acid or base used. For strong acid vs. strong base, phenolphthalein can be used as indicator. For strong acid vs. weak base, methyl orange can be used as indicator. For weak acid vs. strong base, phenolphthalein can be used as indicator.
What chemical change in orange?
You think probable to phenolphthalein used as a pH indicator.
