Problem: Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05? a. HF / KFb. HNO2 / KNO2c. NH3 / NH4Cld. HClO / KClO

FREE Expert Solution
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FREE Expert Solution

We’re being asked which of the given solutions will have the greatest buffering capacity.

The maximum buffering capacity of a solution is when the pH of the solution is equal to pKa and the buffer range of a solution is pH = pKa ± 1

maximum buffering capacity:              pH = pKa
buffering range:              pH = pKa ± 1

Recall the Henderson-Hasselbalch equation:

the ideal buffer is when the amount of conjugate base is equal to the amount of the weak acid.

[conjugate base] = [weak acid]

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Problem Details

Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05?

a. HF / KF

b. HNO/ KNO2

c. NH3 / NH4Cl

d. HClO / KClO

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Buffer concept. You can view video lessons to learn Buffer Or if you need more Buffer practice, you can also practice Buffer practice problems .

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