What is pKa and Ka exactly?

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John_Richey_4A
Posts: 69
Joined: Fri Sep 28, 2018 12:27 am

What is pKa and Ka exactly?

Postby John_Richey_4A » Sun Feb 03, 2019 7:19 pm

title

Aidan Ryan 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:17 am

Re: What is pKa and Ka exactly?

Postby Aidan Ryan 1B » Sun Feb 03, 2019 7:27 pm

pKa is used to describe acids. Lower pKa= stronger.
Ka is the acid dissociation constant. -logKa=pKa

arif_latif_2G
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

Re: What is pKa and Ka exactly?

Postby arif_latif_2G » Sun Feb 03, 2019 7:27 pm

Ka is the equilibrium constant of an acid. If Ka is less than 1, then the acid is considered very weak. pKa is the negative log of Ka, which is just used to make the math a bit easier. The smaller the pKa, the stronger the acid.

Natalie Liu 4I
Posts: 62
Joined: Fri Sep 28, 2018 12:29 am

Re: What is pKa and Ka exactly?

Postby Natalie Liu 4I » Sun Feb 03, 2019 7:29 pm

I think Ka is the dissociation constant and pKa is the negative log of Ka.

GavinAleshire1L
Posts: 29
Joined: Fri Sep 28, 2018 12:21 am

Re: What is pKa and Ka exactly?

Postby GavinAleshire1L » Sun Feb 03, 2019 7:59 pm

pKa is basically a simplified way to view Ka (-logKa), just as pH is a simpler scale to interpret concentrations of H30+.

Shibhon_Shepard
Posts: 62
Joined: Wed Nov 15, 2017 3:04 am

Re: What is pKa and Ka exactly?

Postby Shibhon_Shepard » Wed Feb 20, 2019 1:48 pm

the larger the Ka, the stronger the acid.

KatrinaPho_2I
Posts: 60
Joined: Fri Sep 28, 2018 12:28 am

Re: What is pKa and Ka exactly?

Postby KatrinaPho_2I » Wed Feb 20, 2019 4:35 pm

Ka is [product]/[reactant] in an acidic reaction. pKa is simply the neg log of Ka.

Ashley P 4I
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Joined: Wed Nov 15, 2017 3:04 am

Re: What is pKa and Ka exactly?

Postby Ashley P 4I » Fri Mar 15, 2019 9:55 am

the smaller the Ka, the weaker the acid

Salena Chowdri 1I
Posts: 66
Joined: Fri Apr 06, 2018 11:02 am

Re: What is pKa and Ka exactly?

Postby Salena Chowdri 1I » Sun Mar 17, 2019 1:48 am

Ka is acid dissociation constant and represents the strength of the acid. pKa is the -log of Ka, having a smaller comparable values for analysis. They have an inverse relationship. Larger the Ka, smaller the pKa and stronger the acid.

Matthew Casillas 1C
Posts: 29
Joined: Fri Sep 28, 2018 12:21 am

Re: What is pKa and Ka exactly?

Postby Matthew Casillas 1C » Sun Mar 17, 2019 9:14 am

Would the inverse relationship apply to Kb and pKb as well?

KimGiang2F
Posts: 31
Joined: Fri Sep 28, 2018 12:19 am

Re: What is pKa and Ka exactly?

Postby KimGiang2F » Sun Mar 17, 2019 5:48 pm

Yes, it would. The weaker the base, the smaller the value of Kb and the greater the value of pKb. Essentially, a large Kb value indicates the high level of dissociation of a strong base. A lower pKb value indicates a stronger base.

904837647
Posts: 67
Joined: Tue May 01, 2018 3:00 am

Re: What is pKa and Ka exactly?

Postby 904837647 » Sun Mar 17, 2019 6:21 pm

The acid dissociation constant, Ka, is a quantitative indicator of the strength of an acid in a solution. pKa is simply the negative log of ka.


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