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There is no particular pH that a buffer will be, it depends upon the buffer. It can be any pH. What a buffer does is to cause the pH of the solution to change less than it would without the buffer when acid or base is added to the buffered solution.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoTake either a weak acid combined with a salt of that acid, or a weak base combined with the weak hydrogen acid of that salt, can be used as a buffer. Both components of the conjugated acid/base pair should be added in about the same molar quantity (optimal capacity).
Three examples:
(These buffering 'acid / base' couples are called: conjugates, differing just ONE proton, H+)
- Acetic acid / acetate
and
- monohydrogen phosphate / dihydrogen phosphate
and
- dihydrogen phosphate / phophoric acid
See the link bellow for many interesting details for the preparation of some buffer solutions.
Wiki User
∙ 10y agoYou have always weak acids and weak bases in buffer system. In case of strong acids like sulfuric, hydrochloric or nitric acids you have complete ionization. In weak acid say like Acetic acid you have equilibrium between ionized and unionized acid. So for example you have 10 % acid is ionized and 90 % unionized. Then you have only 10 % acid 'available'. If you utilize it then 10 % from the rest of 90 % will dissociate to give you 10 %. Means you have 9 % acid available out of 90 %. Just 1 % less than what was there before. The process continues to give ions from reservervoir of ions. So it does not allow the drastic change in pH of the medium. (Nature is great !) On other side you have weak based to handle the situation. So it acts like the shock absorber of suspentions of motor vehicle. They buy time for you to absorb the shock.
Wiki User
∙ 16y agoBuffers inhibit any change in pH of a solution. Either a weak acid combined with a salt of the acid, or a weak base combined with a salt of the base, can be used as a buffer.
Wiki User
∙ 7y agoA buffer is a substance which help to maintain the pH of a solution constant.
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Why is water a good pH buffer?
Water is not a good pH buffer.
What happens to the buffer a pH capacity?
The buffer maintain the pH constant.
What happens to the buffer solution pH 7 when acid is added?
When acid is added to a buffer solution at pH 7, the pH of the buffer solution will decrease. However, due to the presence of a conjugate base in the buffer solution, the buffer will resist the change in pH and try to maintain its original pH value. This is because the conjugate base will react with the acid and prevent a significant decrease in pH.
What is the pH range for carbonate bicarbonate buffer?
The pH range for carbonate-bicarbonate buffer is 9,2.
What is the relationship between concentration of ions and the pH scale?
pH = -log10([H3O+]).
The pH of 10x PBS buffer?
PBS pH usually ranges between 7.2 and 7.6.
Why is water a good pH buffer?
Water is not a good pH buffer.
What happens to the buffer a pH capacity?
The buffer maintain the pH constant.
Is HCl a pH buffer?
No, it is not a buffer.
Will buffer pH help with odder in discharge?
will buffer ph help with odd in discharge
How to prepare phosphate buffer pH 5.8?
preparation of 5.8 ph phosphate buffer
What happens to the buffer solution pH 7 when acid is added?
When acid is added to a buffer solution at pH 7, the pH of the buffer solution will decrease. However, due to the presence of a conjugate base in the buffer solution, the buffer will resist the change in pH and try to maintain its original pH value. This is because the conjugate base will react with the acid and prevent a significant decrease in pH.
Why does the pH of an acetate buffer increases after dilution with water?
The pH of water is approximatly 7 (a neutral pH), and the acetate buffer has an acidic pH (less than 7) so when you add distilled water to the buffer the pH will increase.
What is the pH range for carbonate bicarbonate buffer?
The pH range for carbonate-bicarbonate buffer is 9,2.
What stops sudden changes in ph?
A buffer solution.
What is the chemical substance that resists change in pH?
You think to chemical buffers.
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.
