Pa and Pb

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Aiden Metzner 2C
Posts: 104
Joined: Wed Sep 18, 2019 12:21 am

Pa and Pb

Postby Aiden Metzner 2C » Sun Jan 19, 2020 7:38 pm

How do you no whether to use Pa or Pb in an acid base calculation?

KBELTRAMI_1E
Posts: 108
Joined: Sat Jul 20, 2019 12:17 am

Re: Pa and Pb

Postby KBELTRAMI_1E » Sun Jan 19, 2020 7:54 pm

Pa is for acids and Pb is for bases I think

Isabella Dal Porto 1H
Posts: 100
Joined: Fri Aug 30, 2019 12:16 am

Re: Pa and Pb

Postby Isabella Dal Porto 1H » Sun Jan 19, 2020 8:00 pm

Pa is for acid and Pb is for bases. Ka is the dissociation constant for acids and Kb is the dissociation constant for bases.

Ashley Nguyen 2L
Posts: 103
Joined: Sat Aug 17, 2019 12:18 am
Been upvoted: 1 time

Re: Pa and Pb

Postby Ashley Nguyen 2L » Sun Jan 19, 2020 9:33 pm

Pa is for acids and Pb is for bases. Depending on if you are solving for pH or pOH, use Pa to find pH and Pb to find pOH.

Angus Wu_4G
Posts: 102
Joined: Fri Aug 02, 2019 12:15 am

Re: Pa and Pb

Postby Angus Wu_4G » Sun Jan 19, 2020 9:35 pm

Sometimes you are given the value for Ka, but the reaction is basic and you need Kb. You can find Kb from Ka by using the relationship that Ka X Kb = 1.0X10^-14.


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