Can pKa and pH be negative?

From: simondex@xxxxxxxxx
Date: 12 Sep 2005 12:40:47 -0700

Hi, Everyone!

As far as I know, pKa = -log(Ka). Ka is the ratio of conc of the conj
base multiplied by conc of protons over the conc of protonated acid. If
this ratio is greater than one, the pKa should be negative. As far as I
know, pH = -log[H+]. If [H+] is greater than 1, pH should be negative.

I have never seen negative pKa or pH. How come?

Thank You Very Much.

Truly Yours, Simon Dexter

.

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Re: Can pKa and pH be negative?
... >base multiplied by conc of protons over the conc of protonated acid. ... >this ratio is greater than one, the pKa should be negative. ...
(sci.chem)
Re: pKa
... Yes there are plenty of examples of acids whose pKa < 0 The point here is ... I suppose you could have extremely low pKa accompanied by a correspondingly ... you have to know the chemistry. ... >> than protons and hydroxyls in water, ...
(sci.chem)