pKa vs Ka

[Alexis Robles 2k]

What is the difference between Pka and Ka? Thank you

[Justin Ko 4C]

Ka is the acid dissociation constant. Using the formula to calculate pH, we know that p is -log. Therefore, pKa is the -log of the dissociation constant.

[Jessica Tejero 3L]

The dissociation constant Ka is usually written as a quotient of the equilibrium concentrations (in mol/L), denoted by [HA], [A−] and [H3O+]. Relationship between Ka, pKa and acid strength: The smaller the value of Ka, the larger the value of pKa, the weaker the acid.

[Grecia Velasco 1G]

PKa= -Log[Ka] (for weak acids, log of Ka)

Ka= [A-][H+]/[AH] (acid dissociation constant)

Smalled Ka = larger PKa = weaker acid

[Shail Avasthi 2C]

For the following acid equilibrium :

HA <----> H+ + A-

Ka = [H+][A-]/[HA]

pKa = -log[Ka]

[Leila_4G]

Ka will always be given, right? We don't have to memorize any of them, right?

[Leila_4G]

Ka will always be given, right? We don't have to memorize any of them, right?