pH is a measure of the hydrogen ion concentration in an ionic liquid (usually, but not necessarily, a water-based fluid). It is log to the base 10 of the reciprocal of the hydrogen ion concentration., or minus log base 10 of the hydrogen ion concentration (mathematically the same thing), the hydrogen ion concentration being measured in moles.
If the liquid is neutral, it should be 7.0, since the solubility product of hydrogen ion and hydroxide ion in pure water at STP is 10 to the power -14 and these two must be exactly in balance for the solution to be neutral. Is that now as clear as a lignosulphonate drilling fluid? Cheers, Owen. ----- Original Message ----- From: "Richard L Smith" <[email protected]> To: "mogtalk2" <[email protected]> Sent: Wednesday, May 30, 2012 1:00 PM Subject: Re: [mogtalk2] Heater Control Valve 2005 Aero 8 > <<<but I've forgotten my O level physics - what is pH please? >>> > > Not physics David, chemistry! > > Google is your friend! > > Richard S ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?member_id=22459785&id_secret=22459785-4a39ddf8 Powered by Listbox: http://www.listbox.com
