acidity and basicity constant

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Dina Marchenko 2J
Posts: 54
Joined: Thu Jul 25, 2019 12:16 am

acidity and basicity constant

Postby Dina Marchenko 2J » Thu Jan 16, 2020 9:37 pm

When finding Ka or Kb, do you follow the same rules as we learned from last unit with Kp or Kc? Specifically, if one of the products of an acid reaction has a 2 coefficient, do you square the product concentration when finding Ka?

Connie Chen 1E
Posts: 51
Joined: Mon Jun 17, 2019 7:24 am

Re: acidity and basicity constant

Postby Connie Chen 1E » Thu Jan 16, 2020 9:55 pm

Yes, the same rules still apply as it is still an equilibrium constant.

Anthony Hatashita 4H
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

Re: acidity and basicity constant

Postby Anthony Hatashita 4H » Thu Jan 16, 2020 10:47 pm

If they're the same then why do we have different names for them? Just to clarify?

Michael Nguyen 1E
Posts: 120
Joined: Sat Aug 17, 2019 12:17 am

Re: acidity and basicity constant

Postby Michael Nguyen 1E » Thu Jan 16, 2020 11:37 pm

There are different names for equilibrium constants because they provide a little bit more information about the system that is being studied. Kc means the system is dealing with concentrations, Kp means the system is dealing with partial pressures, Kw has to do with water, Ka is for weak acids, and Kb is for weak bases.

Amir Bayat
Posts: 115
Joined: Sat Sep 07, 2019 12:16 am

Re: acidity and basicity constant

Postby Amir Bayat » Thu Jan 16, 2020 11:43 pm

They are all equilibrium constants. The only reason that they have different names is to specify what they are determining. Kp is the partial pressure, Kw is the neutral water, Kc is the concentration, Ka is the weak acid, etc.


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