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Is phenolphthalein an indicator?
Yes, phenolphthalein is an indicator commonly used in acid-base titrations to determine the endpoint of the reaction.
Why phenolphthalein used in titration?
it acts as acid base indicator
Why you use phenolphthalein in titration?
Phenolphthalein is used as an indicator in titrations because it changes color sharply at a specific pH range (approximately 8.2 to 10). This color change helps in determining the endpoint of the titration, which is when the reaction is complete. Phenolphthalein is colorless in acidic solutions and pink in basic solutions, making it ideal for acid-base titrations.
What is the most appropriate indicator for the strong acid/strong base titration?
The most appropriate indicator for a strong acid/strong base titration is phenolphthalein.
What kind of titrations are possible with phenolphthalein as indicator?
Phenolphthalein is commonly used in acid-base titrations because it changes color at a pH range of 8.2-10, making it ideal for determining the endpoint of the titration. It is also used in complexometric titrations to detect the presence of metal ions, as phenolphthalein can form colored complexes with certain metals.
Is phenolphthalein an indicator?
Yes, phenolphthalein is an indicator commonly used in acid-base titrations to determine the endpoint of the reaction.
Why phenolphthalein used in titration?
it acts as acid base indicator
Why you use phenolphthalein in titration?
Phenolphthalein is used as an indicator in titrations because it changes color sharply at a specific pH range (approximately 8.2 to 10). This color change helps in determining the endpoint of the titration, which is when the reaction is complete. Phenolphthalein is colorless in acidic solutions and pink in basic solutions, making it ideal for acid-base titrations.
What is the most appropriate indicator for the strong acid/strong base titration?
The most appropriate indicator for a strong acid/strong base titration is phenolphthalein.
What kind of titrations are possible with phenolphthalein as indicator?
Phenolphthalein is commonly used in acid-base titrations because it changes color at a pH range of 8.2-10, making it ideal for determining the endpoint of the titration. It is also used in complexometric titrations to detect the presence of metal ions, as phenolphthalein can form colored complexes with certain metals.
What is the purpose for using phenolphthalein for an acid base titration?
Phenolphthalein is used as an indicator in acid-base titrations because it changes color at a specific pH range. In an acid-base titration, phenolphthalein changes from colorless to pink when the solution reaches a pH around 8.2-10, indicating the endpoint of the titration. This allows for a visual indication of when the reaction is complete.
What happens when water is added to phenolphthalein?
When water is added to phenolphthalein, the color remains the same, which is colorless. Phenolphthalein is typically used as an indicator in titrations with strong acid and strong base where the color change is triggered by changes in pH, not by the addition of water.
Why is phenolphthalein a better indicator than thymol blue?
Phenolphthalein is a better indicator than thymol blue for acid-base titrations because phenolphthalein changes color at a pH range of 8.2-10, which coincides with the endpoint of many acid-base reactions. Thymol blue, on the other hand, changes color at a pH range of 8.0-9.6, which may not be as precise for determining the endpoint.
Does phenolphthalein indicator remain clear in a acid?
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If phenolphthalein is added to HBr?
If phenolphthalein is added to HBr (hydrobromic acid), which is a strong acid, the phenolphthalein indicator will remain colorless because it only changes color in the presence of a base. Since HBr is an acid, it will not cause the indicator to change color.
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.
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.
