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Why is NH3-NH4CL buffer preferred in edta titration for determination of mg?
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What is the role of buffer solutions in complexometric titration?
Buffer solutions resist the change in PH
What is role of buffer solution in complexometric titration?
buffer solutions resists change in PH
Where is the buffer region in a titration curve for the titration of a weak acid with a strong base?
It is the nearly horizontal region before the equivalence point.
What is the titration curve of phenylalanine?
The titration curve of phenylanaline is around pk value 6.89 which neutral pH. It has a two buffer one in the acidic portion and the neutral one.
What is true when a buffer is formed during a titration?
There are nearly equal amounts of a conjugate acid-base pair.
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 the role of buffer solutions in complexometric titration?
Buffer solutions resist the change in PH
What is role of buffer solution in complexometric titration?
buffer solutions resists change in PH
Where is the buffer region in a titration curve for the titration of a weak acid with a strong base?
It is the nearly horizontal region before the equivalence point.
What is the titration curve of phenylalanine?
The titration curve of phenylanaline is around pk value 6.89 which neutral pH. It has a two buffer one in the acidic portion and the neutral one.
What is true when a buffer is formed during a titration?
There are nearly equal amounts of a conjugate acid-base pair.
Why buffer solution must be used for titration with EDTA?
Because it dissolves prcipitate that form after addion of sodium hydroxide.
Why titration of weak acids and weak bases are not done?
It is difficult to determine the end point of such a titration, because the titration produces a buffer solution that changes its pH very slowly at the end point, in contrast to reaction between a strong acid and strong base.
Why does the pH drop so fast during titration at a certain point?
When there is a buffer present, the buffer makes it difficult to change the pH of a solution. Say for instance a buffer keeps the pH around 6.5 +/- 0.2 . The buffer only works when the pH is in this range. If too much acid or too much base is added, taking the pH out of this range the pH will change quickly, even if only a little extra base or acid is added to the solution.
Why is ammonia-sodium chloride buffer solution is added in the determination of total hardness of water?
ammonia has a strong smell?
Why titrations of weak acids and weak bases are not done?
It is difficult to determine the end point of such a titration, because the titration produces a buffer solution that changes its pH very slowly at the end point, in contrast to reaction between a strong acid and strong base.
Why the weak acid cannot be used as titrant?
If you are titrating a base, using a weak acid as titrant would lead to the formation of a buffer as you added the weak acid. The weak acid would react with the base to form the salt of the weak acid + water, and this would buffer any changes in pH, thus making the titration meaningless.
