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### What is pKa and Ka exactly?

Posted: Sun Feb 03, 2019 7:19 pm
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### Re: What is pKa and Ka exactly?

Posted: Sun Feb 03, 2019 7:27 pm
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
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
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
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
the larger the Ka, the stronger the acid.

### Re: What is pKa and Ka exactly?

Posted: Wed Feb 20, 2019 4:35 pm
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
the smaller the Ka, the weaker the acid

### Re: What is pKa and Ka exactly?

Posted: 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.

### Re: What is pKa and Ka exactly?

Posted: Sun Mar 17, 2019 9:14 am
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
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
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.