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Why is phenolphthalein an appropriate indicator for acid base titrations?
Wiki User
∙ 13y ago
Razor Sharp end point which is between pH 8 and 9 so almost perfectly neutral too.
Wiki User
∙ 13y ago
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Why is starch solution used as indicator in Sodium thiosulphate Iodine titrations instead of phenolphthalein indicator?
Phenolphthalein is an acid base indicator - it does not show the end-point in a thiosulfate type titration. Starch gives a very sharp end-point from a blue-black to colorless end-point when titrating iodine with thiosulfate. Phenolphthalein would just not detect this change.
Phenolphthalein would not be an appropriate indicator to use to determine the Ka1 of phosphoric acid Why What indicator would be appropriate?
Because Phenolphthalein changes color from a pH of 8-10. Orange IV would be a better indicator since it changes color around a pH of 2-3.
What property of phenolphthalein makes it useful indicator for acid-base titrations having equivalence points in the pH range from 7-9?
The colorless solution change to a pink solution (at the pH mentioned).
Does phenolphthalein indicator remain clear in a acid?
Fdf
Why is phenolphthalein used in the titration experiment?
it is used as an acid-base indicator
Why is starch solution used as indicator in Sodium thiosulphate Iodine titrations instead of phenolphthalein indicator?
Phenolphthalein is an acid base indicator - it does not show the end-point in a thiosulfate type titration. Starch gives a very sharp end-point from a blue-black to colorless end-point when titrating iodine with thiosulfate. Phenolphthalein would just not detect this change.
Phenolphthalein would not be an appropriate indicator to use to determine the Ka1 of phosphoric acid Why What indicator would be appropriate?
Because Phenolphthalein changes color from a pH of 8-10. Orange IV would be a better indicator since it changes color around a pH of 2-3.
What property of phenolphthalein makes it useful indicator for acid-base titrations having equivalence points in the pH range from 7-9?
The colorless solution change to a pink solution (at the pH mentioned).
What happens if phenolphthalein was added to salts?
If phenolphthalein is added to a solution of salts, it will not undergo any specific reaction. Phenolphthalein is used as an indicator in acid-base titrations, where it changes color depending on the pH of the solution. Since salts do not have acidic or basic properties, phenolphthalein will not exhibit any color change.
Does phenolphthalein indicator remain clear in a acid?
Fdf
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 you use phenolphthalein in titration?
it acts as acid base indicator
Why phenolphthalein used in titration?
it acts as acid base 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.
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.
Why is phenolphthalein is used in titration experiment?
it is used as an acid-base indicator
