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Topic: Ka for acids/bases  (Read 2434 times)

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Offline ziagemini

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Ka for acids/bases
« on: November 21, 2011, 06:43:17 AM »
Hello All,

Does anybody know any good article about the dependency of Ka with temperature, how does Ka change with the increase or decrease of temperature. If one would like to calculate/find Ka at different temperature e.g. 40°C, how we can find it. Hope to have some supportive answer as before.


Offline Ligte

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Re: Ka for acids/bases
« Reply #1 on: November 22, 2011, 01:29:14 AM »
What you want to determine is the ionization entalphy. This can be done by plotting the pKa versus reciprocal temparature using the van hoff relationship. But most acids/bases typically have low
enthalpies of ionization and consequently have low pKa/Ka dependencies on temperature.

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