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Topic: buffer solution  (Read 2237 times)

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Offline Ibin-Huan

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buffer solution
« on: July 03, 2012, 12:41:43 PM »
why in buffer solution preparation, the value of pKa should near the pH that we want?

Thank you in advance

Offline Ibin-Huan

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buffer solution 2
« Reply #1 on: July 03, 2012, 12:43:00 PM »

in buffer mixtures, why salt does not react with water to hydrolyze as an acid or a base?

Offline Borek

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Re: buffer solution
« Reply #2 on: July 03, 2012, 03:03:46 PM »
why in buffer solution preparation, the value of pKa should near the pH that we want?

http://www.chembuddy.com/?left=pH-calculation&right=pH-buffer-capacity

in buffer mixtures, why salt does not react with water to hydrolyze as an acid or a base?

It does, just like acid dissociates, but in most cases both effects are negligible. Sometimes (especially for a very weak or too strong acids) they can't be ignored.
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