On Wed, 05 Nov 2003 02:33:19 GMT, "Steve B" >
wrote:

>Did you perhaps mean pH < ~4.5? A pH > ~4.5 can bring you into the neutral
>and alkaline ranges.

Although it has been over 40 years since my last chemistry class, I
thought that a pH of 7 was considered neutral and anything above 7 was
considered alkaline. A pH of 4.5 would therefore be decidedly acidic.

Something about 10^-14 comes to mind in the mass action expression

[H] [OH] ~ 10^-14

which means that neutral water has a concentration of hydrogen ions
of 10^-7 moles per liter - that is, a pH of 7.

Am I wrong on this - it has been a very long time?