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Muraxide is used as an indicator in EDTA titrations because it forms a distinct wine-red color complex with metal ions, making it easy to detect the endpoint of the titration. Muraxide is specific for detecting the endpoint of calcium and magnesium titrations when using EDTA as the titrant.
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Why is phenolphthalein indicator not used in EDTA titration?
Phenolphthalein is not suitable for use in EDTA titration because it changes color at a pH range that is much lower than the pH range at which the EDTA-metal complex formation occurs. EDTA titration typically requires indicators that change color in a more acidic pH range.
Why you use pH 10 buffer in EDTA titration and the indicator paper not be put into the solution?
A pH 10 buffer is used in EDTA titrations to ensure that the reaction occurs at a consistent pH that is optimal for the formation of metal-EDTA complexes. The indicator paper is not added to the solution because the color change of the metal-EDTA complex is independent of pH and will occur naturally when all the metal ions are chelated by the EDTA.
Why you use eriochrome black T indicator in EDTA titration?
Eriochrome black T is used as an indicator in EDTA titrations because it forms a stable complex with the metal ions being titrated. It changes color at the endpoint of the titration, which helps in detecting when all the metal ions have been chelated by the EDTA. This color change signifies the completion of the reaction and allows for accurate determination of the metal ion concentration.
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.
What kind of indicators are used in precipitation titration?
Indicators used in precipitation titrations are typically complexometric indicators that form colored complexes with the analyte ions. These indicators change color when the endpoint of the titration is reached, signaling the completion of the precipitation reaction. Common complexometric indicators include EDTA, Eriochrome Black T, and Calconcarboxylic acid.
Why is phenolphthalein indicator not used in EDTA titration?
Phenolphthalein is not suitable for use in EDTA titration because it changes color at a pH range that is much lower than the pH range at which the EDTA-metal complex formation occurs. EDTA titration typically requires indicators that change color in a more acidic pH range.
Why you use pH 10 buffer in EDTA titration and the indicator paper not be put into the solution?
A pH 10 buffer is used in EDTA titrations to ensure that the reaction occurs at a consistent pH that is optimal for the formation of metal-EDTA complexes. The indicator paper is not added to the solution because the color change of the metal-EDTA complex is independent of pH and will occur naturally when all the metal ions are chelated by the EDTA.
Why you use eriochrome black T indicator in EDTA titration?
Eriochrome black T is used as an indicator in EDTA titrations because it forms a stable complex with the metal ions being titrated. It changes color at the endpoint of the titration, which helps in detecting when all the metal ions have been chelated by the EDTA. This color change signifies the completion of the reaction and allows for accurate determination of the metal ion concentration.
What is the need for an ammonical buffer solution in the determination of hardness of water by edta titration?
during the complexometric titration using edta it is very necessary to maintain the ph of the solution near about 10 so we use ammonium chloride buffer if we will not use this buffer dring the titration ph of sol. will ho lower side
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.
How do you standardize 0.02N EDTA solution?
To standardize a 0.02N EDTA solution, you can use a calcium or magnesium salt solution of known concentration. First, prepare a sample of the metal salt and titrate it with the EDTA solution, using a suitable indicator like Eriochrome Black T for calcium or magnesium. The endpoint is reached when the color changes, indicating that all metal ions have complexed with the EDTA. Calculate the exact normality of the EDTA based on the volume used in the titration and the initial concentration of the metal salt.
What kind of indicators are used in precipitation titration?
Indicators used in precipitation titrations are typically complexometric indicators that form colored complexes with the analyte ions. These indicators change color when the endpoint of the titration is reached, signaling the completion of the precipitation reaction. Common complexometric indicators include EDTA, Eriochrome Black T, and Calconcarboxylic acid.
Why you use pH 10 buffer in EDTA titration?
It is necessary to keep the pH at about 10 for two reasons: (a) all reactions between metal ions and EDTA are pH dependent, and for divalent ions, solutions must be kept basic (and buffered) for the reaction to go to completion; (b) the eriochrome black T indicator requires a pH of 8 to 10 for the desired color change.
Why you use pH 10 buffer in EDTA titrtion?
A pH 10 buffer is used in EDTA titration because it ensures that the metal ions being titrated remain in their complexed form with EDTA, which has higher stability at alkaline pH. This helps in achieving accurate and precise results in the titration process.
How to check concentration of 0.1M edta?
To check the concentration of a 0.1 M EDTA solution, you can use a titration method with a suitable metal ion, such as calcium or magnesium, as a titrant. By adding a known concentration of metal ion solution and using an indicator (like Eriochrome Black T), you can determine the endpoint of the reaction. Additionally, you can use a spectrophotometric method to measure the absorbance of a diluted sample of the EDTA solution, comparing it to a standard curve created from known concentrations.
How much phenolphthalein indicator should be used?
Typically, 1-2 drops of phenolphthalein indicator are sufficient to use in an acid-base titration experiment. It is important not to use too much indicator, as it can affect the accuracy of the titration results.
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.
