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Q: What isphenolphthalein indicator end point?
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The point in a titration at which the indicator changes is called the?

End point...


Why indicator is being used in titration?

An indicator is so you can see when the end point of the reaction occurs, or when the reaction is complete. This can be an acid-base indicator such as methyl orange which determines the end point with a colour change.


What is the best way to choose an indicator for use in titration?

Choose the indicator so that the end point and equivalance point are at the same volume.Type your answer here...


What is end point of titration?

When the indicator shows that the test liquid is neutral.


What is titration end point?

When the indicator shows that the test liquid is neutral.


What is the difference between end point and equilibrium point in chemistry?

Equivalence point is the point at which the reaction is justcomplete. End point is when there is a permanent color change due to the presence of a 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.


How does the equivalence point of a titration differ from its end point?

The equivalence point is the point where the number of moles of base equal the number of moles of acid. The end point is the point where the indicator being used changes color (also 'indication point)'. If the indicator is chosen correctly, the end point will essentially be exactly as near as possible at the equivalence point. The point of the titration is to find the equivalence point -- the end point is just a very close approximation to it. This is because the pH of the solution changes very rapidly close to the equivalence point. Therefore, the indicator will change color very close to the equivalence point because of the steepness of the pH change.


In a titration when does the indicator change color?

when the equivalence point of a titration is achieved.. Added: (More precisely:) The equivalence point is the point where the number of moles of base equal the number of moles of acid. The end point is the point where the indicator being used changes color (also 'indication point)'. If the indicator is chosen correctly, the end point will essentially be exactly as near as possible at the equivalence point. The point of the titration is to find the equivalence point -- the end point is just a very close approximation to it. This is because the pH of the solution changes very rapidly close to the equivalence point. Therefore, the indicator will change color very close to the equivalence point because of the steepness of the pH change


Describe a method to visually detect the end point of a titration without the use of instruments?

The method used most often in chemistry labs is by use of a pH indicator in the sample being titrated. When you reach the titration point, the indicator will change colors, demonstrating the end point of the titration.


. What is the minimum pH change required for a sharp indicator color change at the end point Why?

منحني


What is a 'pyrocatechol indicator'?

Pyrocatechol indicator is used as an end point indicator for titrating nickel metal in a sulfamate nickel cobalt plating bath. It may also be used for other chemical analysis titrations.