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Indicators used outside the titration flask are termed as external indicators. A very commonly used external indicator is potassium ferricyanide
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∙ 14y ago
An external indicator in titration is a substance that is added in small amounts to the analyte solution during titration to signal the endpoint of the reaction. It changes color at or near the equivalence point, making it easier for the observer to detect when the reaction is complete. Common examples of external indicators include phenolphthalein and methyl orange.
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Why in titration of kmno4 no indicator is used?
In the titration of KMnO4, no indicator is used because KMnO4 is a self-indicating titrant. It undergoes a color change from purple to colorless (or brown) at the endpoint of the titration, which makes it unnecessary to add an external indicator. The precise endpoint can be easily detected visually, making the use of an indicator redundant.
Why are external indicators used in titration of estimation of purity of alcohol?
External indicators are used in the titration of alcohol to estimate purity because they provide a distinct color change at the endpoint of the titration. This color change signals when the reaction between the alcohol and titrant is complete, helping to determine the concentration and purity of the alcohol sample accurately. Using an external indicator ensures that the endpoint of the titration is clearly visible and can be easily identified.
Is methylorange the indicator used in the titration of Na2CO3 against HCl solution?
Methyl orange is not commonly used as an indicator in the titration of Na2CO3 against HCl solution. Phenolphthalein is a suitable indicator for this titration because it changes color in the pH range of the equivalence point.
How you select that which indicator should be used in any titration?
The selection of an indicator for a titration is based on the pH range over which the titration will occur. The indicator should have a color change that aligns with the pH at the equivalence point of the titration. Choosing an indicator with a pH range that encompasses the equivalence point will ensure accurate endpoint detection.
What is meant by the end point during a titration?
The end point in a titration is when the indicator used changes color, signaling that the reaction is complete. It indicates that the stoichiometric amount of titrant has been added to react completely with the analyte.
Why in titration of kmno4 no indicator is used?
In the titration of KMnO4, no indicator is used because KMnO4 is a self-indicating titrant. It undergoes a color change from purple to colorless (or brown) at the endpoint of the titration, which makes it unnecessary to add an external indicator. The precise endpoint can be easily detected visually, making the use of an indicator redundant.
Why are external indicators used in titration of estimation of purity of alcohol?
External indicators are used in the titration of alcohol to estimate purity because they provide a distinct color change at the endpoint of the titration. This color change signals when the reaction between the alcohol and titrant is complete, helping to determine the concentration and purity of the alcohol sample accurately. Using an external indicator ensures that the endpoint of the titration is clearly visible and can be easily identified.
Is methylorange the indicator used in the titration of Na2CO3 against HCl solution?
Methyl orange is not commonly used as an indicator in the titration of Na2CO3 against HCl solution. Phenolphthalein is a suitable indicator for this titration because it changes color in the pH range of the equivalence point.
What is meant by the end point during a titration?
The end point in a titration is when the indicator used changes color, signaling that the reaction is complete. It indicates that the stoichiometric amount of titrant has been added to react completely with the analyte.
How you select that which indicator should be used in any titration?
The selection of an indicator for a titration is based on the pH range over which the titration will occur. The indicator should have a color change that aligns with the pH at the equivalence point of the titration. Choosing an indicator with a pH range that encompasses the equivalence point will ensure accurate endpoint detection.
Why k3fecn6 used as an external indicator?
K3Fe(CN)6, also known as potassium ferricyanide, is often used as an external indicator in redox titrations because of its distinct color change. It turns from yellow to colorless upon reaction with excess titrant, making it easy to visually detect the endpoint of the titration.
Which indicator is used in titration of naoh and h2so4?
Phenolphthalein is commonly used as an indicator in the titration of NaOH and H2SO4. It changes color from colorless to pink as the solution reaches a specific pH range, signaling the endpoint of the titration.
What is another example of indicator that used in titration with EDTA?
Another example of an indicator used in a titration with EDTA is Eriochrome Black T. This indicator changes color from red to blue when it forms a complex with metal ions, allowing for the detection of the end point in the titration.
Is methyl orange the indicator used in the titration of na2co3 against hcl solution?
No, methyl orange is not commonly used as the indicator in the titration of Na2CO3 against HCl solution. Phenolphthalein is the indicator of choice for this titration, as the endpoint is at a pH of around 8.2, which is the color change range of phenolphthalein.
What is double indicator titration?
Double indicator titration is a type of titration method that involves the use of two different indicators to determine the endpoint of the reaction. The first indicator changes color near the starting pH of the titration, while the second indicator undergoes a distinct color change at or near the endpoint of the titration. This technique is commonly used in complexometric titrations to determine the concentrations of metal ions in a solution.
Why are only a few drops of indicator used in a titration?
Only a few drops of indicator are used in a titration to avoid affecting the results by introducing excessive impurities into the solution. The indicator is added to help visually determine the endpoint of the titration, where the reaction is completed. Adding more indicator than necessary can lead to errors in the measurements.
Is phenolpthalen an indicator?
Yes - it's used in acid-base titration.
