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Q: The complexometric titration where EDTA is used carried out at basic pH. Why?
  • A. For the stability of complex formed
  • B. Reaction rate is optimum in basic pH
  • C. There is less number of side reaction
  • D. All of the above
Correct Answer: Option D - In complexometric titration where EDTA is used the titration is typically carried out at a basic pH for several reasons. 1. For the stability of the complex formed:- EDTA forms more stable complexes with metal ions at higher pH levels. 2. Reaction rate is optimum in basic pH:- The rate of complexation reactions in generally faster in a basic environment. 3. There is less number of side reaction:- At basic pH, the likelihood of competing reaction (Such as hydrolysis of metal ions) is reduced, leading to more accurate titration results.
D. In complexometric titration where EDTA is used the titration is typically carried out at a basic pH for several reasons. 1. For the stability of the complex formed:- EDTA forms more stable complexes with metal ions at higher pH levels. 2. Reaction rate is optimum in basic pH:- The rate of complexation reactions in generally faster in a basic environment. 3. There is less number of side reaction:- At basic pH, the likelihood of competing reaction (Such as hydrolysis of metal ions) is reduced, leading to more accurate titration results.

Explanations:

In complexometric titration where EDTA is used the titration is typically carried out at a basic pH for several reasons. 1. For the stability of the complex formed:- EDTA forms more stable complexes with metal ions at higher pH levels. 2. Reaction rate is optimum in basic pH:- The rate of complexation reactions in generally faster in a basic environment. 3. There is less number of side reaction:- At basic pH, the likelihood of competing reaction (Such as hydrolysis of metal ions) is reduced, leading to more accurate titration results.