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Is buffer capacity the same if determined by titration with a strong base instead of a strong acid?
Wiki User
∙ 16y ago
It depends a bit on the buffer itself, but it is usually true. Generally speaking, a buffer is a solution composed of a weak acid (or base) along with its conjugate base (or acid). Usually, the two components (let's call the HA and A- for a weak acid and its conjugate base) are added in equal concentrations. If this is the case, then it is also true that the pH of the solution is equal to the pKa of the weak acid, a very useful fact. If the concentration of two HA and A- are equal, then the buffer capacity should be the same using a strong acid or strong base. However, you can also make a buffer with unequal concentrations of HA and A-. This is still considered a buffer solution, and it will resist change to pH in both directions, but unequally now. If you have a higher concentration of HA than A-, then the buffer will have a higher capacity to resist pH change if you add a strong base (because the base will be deprotonating HA, which you have more of). If you added a strong acid instead, then you would protonate all the A- faster (than you would deprotonate HA with the same amount of strong base), and so it would have a lower buffer capacity. This discussion works equally well if you are using a weak base (B) and its conjugate acid (HB+) instead, except everything is switched!
Wiki User
∙ 16y ago
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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 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
What is buffer capacity and what are the factors that effect the buffer capacity?
it is defined the capability of a buffer to resist the change of pH.it can be measured quantity that how much extra acid or base , the solution can absorb before the buffer is essentially destroyed. buffer capacity of a buffer solution is determined by the sizes of actual molarities . so , a chemist must decide before making the buffer solution.
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
Why doesn't the rectum have buffer capacity?
The rectum doesn't have enough fluids to have buffer capacity.
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 buffer capacity of a solution of a strong base directly proportional to?
The buffer capacity of a strong base is directly proportional to the concentration of hydroyxl ions. Buffer capacity = 2.303 x [OH-]
Does buffer capacity depend on the amount of buffers present?
Yes. The higher the number of buffers, the higher the buffer capacity.
What happens to the buffer a pH capacity?
The buffer maintain the pH constant.
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.
Effect of Diluting a buffer?
The buffer capacity increases as the concentration of the buffer solution increases and is a maximum when the pH is equal to the same value as the pKa of the weak acid in the buffer. A buffer solution is a good buffer in the pH range that is + or - 1 pH unit of the pKa. Beyond that, buffering capacity is minimal.
What is true when a buffer is formed during a titration?
There are nearly equal amounts of a conjugate acid-base pair.
