Quote Originally Posted by Rudeofus View Post
Katies question is very valid, just take a look how pH is defined. Based on that definition people started calling anything which might behave like an acid when dissolved in water as "low pH" and anything which could possibly behave caustic as "high pH".

In other words, "low pH breath" and "high pH solids" are nothing but careless use of chemical terminology.
It is so nice to have just another quote from Wikipedia
Any practical knowledge outside of the common frame or the so beaten up "standard laboratory conditions"?
I am curious to hear how many people are aware (first hand experience) of basic stuff, like the CO2 concentration of the air inside a lens and what is necessary for H2CO3 ?
Let alone histone clusters, o-orsellinic acid or more esoteric stuff.