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what is the purpose of Buffer in any titration?Ex:In
determination of hardness of water we use ammonia
ammoniachloride buffer in titration with EDTA.Why?
- 13 Answers
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Answer / tushar
buffer is used to maintain ph of respective solution.
| Is This Answer Correct ? | 205 Yes | 20 No |
Answer / rahul jain
during the complexometric titration using EDTA, it is very necessary to maintain the pH of the solution near about 10.so we use ammonia ammoniumchloride buffer.if we will not use this buffer, during the titration pH of solution will go lower side(acidic side).
| Is This Answer Correct ? | 182 Yes | 22 No |
Answer / suresh
Buffer is a substance it will little resist change in the
pH of the solution.
In Hardness estimation the major substances in water is
Calcium carbonate and magnesium carbonate. The ammonia and
ammonium chloride buffer pH is 10. At the particular pH it
will form the complex with both calcium and magnesium.So
the titre value gives the total hardness of the solution.
If you want to measure calcium alone instead of adding pH
10 buffer add pH 12 buffer (1M NaoH).
| Is This Answer Correct ? | 81 Yes | 8 No |
Answer / dr. sanjay rana
It is necessary to Control the pH of Titration medium in
complexometric titration becoz, The complex form in this
titration is stable at more pH.(more than -6) and if pH
change the result will also change.
| Is This Answer Correct ? | 56 Yes | 18 No |
Answer / akbari syed
buffer is usually added to maintain the pH of the solution.
| Is This Answer Correct ? | 34 Yes | 3 No |
Answer / bhagyashree
During reaction between metal and EDTA, H+ ions are formed & decreases the pH of reaction mixture. Hence, a buffer solution of pH 10 is necessary during titration for Ca++ & Mg++ so that it will not allow the decrease of pH.
| Is This Answer Correct ? | 13 Yes | 0 No |
Answer / vikash singh(up college
we use high buffer solution to mantain the pH of the solution medium bacause if we not use it then the pH of the solution decreases and the stability of the chelating complex decreases.
| Is This Answer Correct ? | 10 Yes | 2 No |
Answer / gulendra kumar
The role of buffer soution in complexometric titration is to adjust the PH to ensure that the reaction goes to completion .
| Is This Answer Correct ? | 4 Yes | 3 No |
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