1 M H+ has a pH of 0. So does 10 M have a pH of -1? Similarly, does 10 M OH- have a pH of 15, 100 M OH- a pH of 16 and so on?
2006-11-29 17:42:07 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
theoretically yes 10m acid has a pH of -1, and 10 moles of base pH 15.
But , in fact, for very high concentrations, you must not take in account the concentration of ions H+ but the activity . The actvity takes in account the high concentration and is
activity = gamma * pH where gamma is lower than one for high concentrations
2006-11-29 17:48:11 · answer #1 · answered by maussy 7 · 2⤊ 0⤋
The pH of acids does not keep on going down with increased concentration because there is not enough water around for the acid to ionise completely - it is as if it becomes a weak acid at high concentrations, by not ionising fully.
2006-11-30 02:50:40 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋
yup
2006-11-30 03:22:06 · answer #3 · answered by kingtut2082 1 · 0⤊ 0⤋