[sickness]

ok 2 questions.
1.) Anyone know any good refernece sites that explain how to put together Pe-Ph diagrams by hand or can explain the basic steps.

2.) Anyone got a general solubility formula?  I and currently working on a problem with elemental Ag in pure water with Ph=7 at 25C assuming it will become Ag(OH)2- and precip native Ag through hydrolisis assuming those are the only reactions and activity = to concentration.
I was thinking I could use dissociation like Ksp= [Ag{OH}2-][Ag] but no concentration is given.  Anysuggestions would be great