Strength of an Acid/Base

Acidity
Basicity
The Conjugate Seesaw

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Sofia Ban
Posts: 80
Joined: Fri Sep 28, 2018 12:25 am

Strength of an Acid/Base

Postby Sofia Ban » Fri Jan 17, 2020 6:57 pm

What is Ka and Kb? and what is its relationship to pKa/pKb and the strength/weakness of the acid/base?

Deepika Reddy 1A
Posts: 125
Joined: Thu Jul 11, 2019 12:15 am

Re: Strength of an Acid/Base

Postby Deepika Reddy 1A » Sat Jan 18, 2020 1:37 am

Ka is the equilibrium constant for an acid reaction while Kb is the equilibrium constant for a base reaction. Ka is related to pKa because pKa= -log(Ka) while pKb is related to Kb because pKb =-log(Kb). The larger the value of Ka, the stronger the acid and the larger the value of Kb, the stronger the base. The lower the pKa, the stronger the acid, and the lower the pKb, the stronger the base.

Ashley Tran 2I
Posts: 108
Joined: Thu Jul 11, 2019 12:17 am

Re: Strength of an Acid/Base

Postby Ashley Tran 2I » Sat Jan 18, 2020 9:16 am

Ka and Kb represent the dissociation constant of the acid/base reaction. Thus, the high the Ka or Kb the stronger acid/base because it is more like to give/accept an H+


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