Buffer Solution pH: Impact of Adding 1L of 5pH on a 100L Solution

Thread starter ratiram
Start date Dec 8, 2006
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Buffer Ph

In summary, a buffer solution is a solution that resists changes in pH by using a weak acid or base to react with added acid or base. This prevents a significant change in the concentration of hydrogen ions or hydroxide ions. The pH range of a buffer solution depends on the strength of the weak acid or base, and can be calculated using the Henderson-Hasselbalch equation or determined experimentally. Buffer solutions are important in scientific research for maintaining stable pH and controlling reactions.

Dec 8, 2006

ratiram

what will be the new pH of a 100 lt solution if 1 lt buffer solution of 5 pH is added to it

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Dec 9, 2006

GCT

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https://www.physicsforums.com/showthread.php?t=94384

Dec 13, 2006

Borek

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While it may be not obvious, question is ambiguous.

1. What is a buffer solution?

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. It is made up of a weak acid and its conjugate base, or a weak base and its conjugate acid.

2. How does a buffer solution maintain a constant pH?

A buffer solution maintains a constant pH by having the weak acid or base react with any added acid or base, preventing a significant change in the concentration of hydrogen ions (H+) or hydroxide ions (OH-) in the solution.

3. What is the pH range of a buffer solution?

The pH range of a buffer solution depends on the strength of the weak acid or base used. Generally, a buffer solution can maintain a pH within one unit of its pKa (acid) or pKb (base) value. For example, a buffer solution with a pKa of 4 can maintain a pH between 3 and 5.

4. How is the pH of a buffer solution calculated?

The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([conjugate base]/[weak acid]). Alternatively, pH can be determined experimentally by measuring the concentrations of the weak acid and its conjugate base and using a pH meter.

5. Why are buffer solutions important in scientific research?

Buffer solutions are important in scientific research because they help maintain a stable pH, which is crucial for many biological and chemical processes. They are also used to calibrate and standardize pH meters, and to control the pH in experiments and reactions.