On 10/09/2012 10:30, Chris Hogg wrote:
On Sun, 09 Sep 2012 21:32:26 +0100, Rick Hughes
wrote:



http://www.engineeringtoolbox.com/food-ph-d_403.html

http://chemistry.about.com/od/acidsbases/a/phtable.htm



Exactly what I was after .... Thank you