0
What else can I help you with?
Why is the titration not carried in acid medium in edta method?
Titration is not carried out in an acid medium in EDTA method because at low pH levels, the formation of metal-EDTA complexes is hindered, leading to inaccurate results. The EDTA molecule itself is stable at a slightly alkaline pH, which enhances its chelating ability and ensures more accurate complex formation with metal ions.
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 have to add buffer before titration with EDTA?
Adding a buffer solution before titration with EDTA helps to maintain a constant pH which is crucial for the formation of metal-EDTA complexes. The buffer solution prevents any fluctuations in pH that could affect the accuracy and precision of the titration results.
Why is a solution containing a metal ion buffered before titration with EDTA?
Buffering the solution containing a metal ion before titration with EDTA helps maintain a constant pH, which is crucial for the accuracy and precision of the titration. The buffering prevents large pH changes that could affect the formation of metal-EDTA complexes and lead to errors in the titration results.
Why must use buffer solution in titration involving EDTA?
EDTA is Ethydiaminotetraacetic acid. In some titrations, it is best to avoid any sharp pH changes(except in acid-base titrations, of course). Buffers are the right substances to help maintain a constant pH.
Why is the titration not carried in acid medium in edta method?
Titration is not carried out in an acid medium in EDTA method because at low pH levels, the formation of metal-EDTA complexes is hindered, leading to inaccurate results. The EDTA molecule itself is stable at a slightly alkaline pH, which enhances its chelating ability and ensures more accurate complex formation with metal ions.
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 have to add buffer before titration with EDTA?
Adding a buffer solution before titration with EDTA helps to maintain a constant pH which is crucial for the formation of metal-EDTA complexes. The buffer solution prevents any fluctuations in pH that could affect the accuracy and precision of the titration results.
Why is a solution containing a metal ion buffered before titration with EDTA?
Buffering the solution containing a metal ion before titration with EDTA helps maintain a constant pH, which is crucial for the accuracy and precision of the titration. The buffering prevents large pH changes that could affect the formation of metal-EDTA complexes and lead to errors in the titration results.
Why must use buffer solution in titration involving EDTA?
EDTA is Ethydiaminotetraacetic acid. In some titrations, it is best to avoid any sharp pH changes(except in acid-base titrations, of course). Buffers are the right substances to help maintain a constant pH.
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.
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
How does EDTA and titration work?
EDTA is a chelating agent that binds to metal ions. In titration, EDTA is used to determine the concentration of metal ions in a solution by forming a complex with the metal ion. The endpoint of the titration is identified by a color change indicator or a pH meter, indicating that all metal ions have reacted with EDTA.
Why do buffers added in EDTA titration?
Buffers are added in EDTA titrations to maintain a constant pH of the solution. This is important because the formation of metal-EDTA complexes, which is critical in EDTA titrations, often requires a specific pH range to ensure accurate and precise results. Buffers help prevent pH changes due to addition of EDTA or metal ions, ensuring the reaction occurs under stable conditions.
Why buffer solution must be used for titration with EDTA?
A buffer solution must be used for titration with EDTA because it helps maintain a constant pH during the titration process. EDTA forms complexes with metal ions at specific pH levels, so maintaining a steady pH ensures accurate and reproducible results. Additionally, a buffer solution helps prevent changes in the pH that could interfere with the formation of the metal-EDTA complexes.
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.
What are the limitations of the edta titration?
Some limitations of EDTA titration include potential masking effects from interfering ions, the need for a pH buffer to maintain a stable pH, and the complexity of calculating results due to multiple metal ions present in a sample. Additionally, EDTA titration may not be suitable for analyzing metal ions at very low concentrations or in samples with high turbidity.
