pka v. ka

The Conjugate Seesaw

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Abigail Menchaca_1H
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pka v. ka

Postby Abigail Menchaca_1H » Sun Dec 01, 2019 11:18 pm

What is the difference between pKA and KA?

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Re: pka v. ka

Postby JasonKwon_3k » Sun Dec 01, 2019 11:20 pm

pKa = -log(ka)

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Re: pka v. ka

Postby madawy » Sun Dec 01, 2019 11:21 pm

Whenever you see a "p" in front of a value, like pH, pKa, and pKb, it means you're dealing with a -log of the value following the "p". For example, pKa is the -log of Ka. Because of the way the log function works, a smaller pKa means a larger Ka.

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Re: pka v. ka

Postby sbeall_1C » Sun Dec 01, 2019 11:22 pm

The difference between pKa and Ka is that the pKa is the negative logarithm of Ka. The lower the Ka value, the greater the pKa value, and therefore the stronger the acid.

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Re: pka v. ka

Postby zoedfinch1K » Sun Dec 01, 2019 11:23 pm

KA is the equilibrium constant with the formula:
KA= [products]/[reactants]

pKA is just the -log of the KA:
pKA= -log[KA]

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