Re: Physical Interpretation of Negative pH.
- From: "Farooq W" <farooq.w@xxxxxxxxx>
- Date: 29 Aug 2005 10:08:59 -0700
Borek wrote:
> On Mon, 29 Aug 2005 17:09:43 +0200, Farooq W <farooq.w@xxxxxxxxx> wrote:
>
> > (iii) A short note in J.Chem.Ed has a procedure for making a pH
> > -47 to +47 HCl solution which I think is meant to be a joke.
> >
> > Suppose we have 1 liter of 1x10^-6 M HCl, add about 99 L of water, the
> > [HCl] is 1x10^-8 M and pH= 8. Now suppose you have single molecule of
> > HCl in 10^23 L of water, so that
> > [HCl] = 1.7x10^-47, the pH is then 47!
>
> I agree with Marvin - that's not even funny.
Fortunately this is not my view too. The Journal of Chemical Education
must be held responsible for spreading such ideas.
>
> http://www.chembuddycom/?left=pH-calculation&right=pH-strong-acid-base
>
> Best,
> Borek
> --
> http://www.chembuddy.com - chemical calculators for labs and education
> BATE - program for pH calculations
> CASC - Concentration and Solution Calculator
> pH lectures - guide to hand pH calculation with examples
.
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