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Topic: calculate Ka  (Read 2628 times)

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Offline donshishi

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calculate Ka
« on: December 16, 2008, 03:23:46 PM »
If [H+] and [acid] are known
The equation should be [H+][acid-]/[acid]= Ka   right?   
But what I don't get is, if only [H+] and [acid] are known and [acid-] is not, how can you then calculate the value of Ka?   

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Offline Borek

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Re: calculate Ka
« Reply #1 on: December 16, 2008, 05:09:53 PM »
Take a look at stoichiometry of dissociation.

Alternatively, think about charge balance.
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