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What is pKa and Ka exactly?

Posted: Sun Feb 03, 2019 7:19 pm
by John_Richey_4A
title

Re: What is pKa and Ka exactly?

Posted: Sun Feb 03, 2019 7:27 pm
by Aidan Ryan 1B
pKa is used to describe acids. Lower pKa= stronger.
Ka is the acid dissociation constant. -logKa=pKa

Re: What is pKa and Ka exactly?

Posted: Sun Feb 03, 2019 7:27 pm
by arif_latif_2G
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.

Re: What is pKa and Ka exactly?

Posted: Sun Feb 03, 2019 7:29 pm
by Natalie Liu 4I
I think Ka is the dissociation constant and pKa is the negative log of Ka.

Re: What is pKa and Ka exactly?

Posted: Sun Feb 03, 2019 7:59 pm
by GavinAleshire1L
pKa is basically a simplified way to view Ka (-logKa), just as pH is a simpler scale to interpret concentrations of H30+.

Re: What is pKa and Ka exactly?

Posted: Wed Feb 20, 2019 1:48 pm
by Shibhon_Shepard
the larger the Ka, the stronger the acid.

Re: What is pKa and Ka exactly?

Posted: Wed Feb 20, 2019 4:35 pm
by KatrinaPho_2I
Ka is [product]/[reactant] in an acidic reaction. pKa is simply the neg log of Ka.

Re: What is pKa and Ka exactly?

Posted: Fri Mar 15, 2019 9:55 am
by Ashley P 4I
the smaller the Ka, the weaker the acid

Re: What is pKa and Ka exactly?

Posted: Sun Mar 17, 2019 1:48 am
by Salena Chowdri 1I
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.

Re: What is pKa and Ka exactly?

Posted: Sun Mar 17, 2019 9:14 am
by Matthew Casillas 1C
Would the inverse relationship apply to Kb and pKb as well?

Re: What is pKa and Ka exactly?

Posted: Sun Mar 17, 2019 5:48 pm
by KimGiang2F
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.

Re: What is pKa and Ka exactly?

Posted: Sun Mar 17, 2019 6:21 pm
by 904837647
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.