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If the pH of a buffer solution is equal to the pKa of the acid in the buffer, what does this tell you about the relative concentrations of the acid and conjugate base forms of the buffer components?

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Histrionicus

Answer:

The correct answer is - The acid base concentration must be equal.

Explanation:

If a buffer solution have equal pH to the pKa of the acid in the buffer, so according to the henderson- hasselbalch equation:

pH=pKa+log [base]/[acid]

Henderson- hasselbalch equation helps to calculate the pH of a buffer solution from the starting concentrations of the acid and its conjugated base or vice versa of the solution of the buffer as long as the value of x is small approximation.

pH = pKa + log [base / acid]

= pKa + log [ x / x ]

pH = pKa

Thus, the correct answer is - the acid base concentration must be equal.

Eduard22sly

The statement given in the question above simply tells us that the acid base concentration must be equal.

Data obtained from the question

  • pH = pKa

Henderson - Hasselbalch equation

pH = pKa + Log [base]/[acid]

From the above equation, we can determine the value of concentration of the acid and base as illustrated below:

pH = pKa + Log [base]/[acid]

But,

pH = pKa

Thus,

pKa = pKa + Log [base]/[acid]

Collect like terms

pKa – pKa = Log [base]/[acid]

0 = Log [base]/[acid]

Take the anti-log of 0

[base]/[acid] = anti-log 0

[base]/[acid] = 1

Cross multiply

[base] = [acid]

From the calculation made above, we can conclude that the pH is equal to pKa because the concentration of the acid and base are equal.

Learn more about pH of buffer:

https://brainly.com/question/3709867

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