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Titration with strong base requires eg. methyl red, changing to yellow at 6.2, but it endpoint may come too early when the sulfonic acid is weaker than acetic acid: OK if pKa < 4.5 .
So it's safer to use phenolphaleine (purple at pH=8.5) for acids with pKa < 8
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Why is phenolphthalein used in the titration experiment?
it is used as an acid-base indicator
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).
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
Which indicator is used for the titration of weak acid and strong base?
Phenopthalene is used commonly
Why is phenolphthalein used in the titration experiment?
it is used as an acid-base indicator
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).
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
Is phenolpthalen an indicator?
Yes - it's used in acid-base titration.
Which indicator is used for the titration of weak acid and strong base?
Phenopthalene is used commonly
Which indicator is used in titration for strong acid?
It depends on the 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.
The purpose of an indicator in a titration experiment?
The indicator is used to measure the end point of titration. Methyl red and phenolphthalein are frequently used indicators in acid-base titration. Potassium permanganate can used as a self indicator in redox titrations where applicable.
What creteria is used for chosing an indicator in acid base titration?
pH range of indicator should be in the rapid pH gradient.
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 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.
Why 2N sulphuric acid is used in oxalic acid estimation?
This titration is based on the neutralization reaction between oxalic acid and sulfuric acid; a pH indicator is used.
