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mickey16 mickey16
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Posts: 40
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11 years ago
I was wondering how and why the value for Ka of the first hydronium ion in a polyprotic acid differs from the Ka value of the second, and so on.
Wikipedia is erroneous in this respect!
Please only give an answer if you are sure Slight Smile
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wrote...
11 years ago
to understand this you have to relate ka or pka to stability.  the stronger acid has a more stable conjugate base.    as the acid gives up more H+'s, it becomes more -.  putting all that negative charge means it becomes less stable.
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