pKa/pKb

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Jasleen Kahlon
Posts: 52
Joined: Wed Nov 21, 2018 12:19 am

pKa/pKb

Postby Jasleen Kahlon » Sun Jan 26, 2020 11:09 pm

I don't fully understand how pKa and pKb are related to pH and Ka/Kb. Can someone please explain what pKa and pKb are?

Ariana Iranmahboub1G
Posts: 114
Joined: Fri Aug 09, 2019 12:17 am

Re: pKa/pKb

Postby Ariana Iranmahboub1G » Sun Jan 26, 2020 11:14 pm

pKa and pKa are the -log of Ka/Kb. You can convert pH to Ka using 10^-ph. You can do the same with pOH by converting pOH to Kb using 10^-pOH.

Myka G 1l
Posts: 100
Joined: Fri Aug 30, 2019 12:17 am

Re: pKa/pKb

Postby Myka G 1l » Sun Jan 26, 2020 11:15 pm

pKb is the -log(Kb) and pKa is the -log(Ka). pH is related to pKa through the Henderson Hasselbach equation -> pH= log[A-]/[HA] + pKa

KaleenaJezycki_1I
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Joined: Sat Aug 17, 2019 12:18 am
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Re: pKa/pKb

Postby KaleenaJezycki_1I » Sun Jan 26, 2020 11:18 pm

Ariana Iranmahboub1G wrote:pKa and pKa are the -log of Ka/Kb. You can convert pH to Ka using 10^-ph. You can do the same with pOH by converting pOH to Kb using 10^-pOH.


And Just for clarification they are related to pH because they are dissociation constants, they show how much an acid or base dissociate which then determines the strength of the acid or base which is reflected in its pH value. Stronger acids and bases dissociate more than weak acids and bases.


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