Dari R.

asked • 04/01/20

How does pKa relate to the final pH of a NH3/NH4Cl buffer system?

How is this related to all buffers in general?

1 Expert Answer

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Milica M. answered • 04/04/20

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To calculate pH of a buffer solution you need to use Henderson Hassebalch equation:


pH = pKa + [A-}/[HA]


which in this case will be


pH = pKa + [NH3]/[NH4+]. The final pH will defend on pKa of this protonation and ratio of the two concentrations.

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