Distilled water has the a neutral ph. Pure water always has a ph of 7.
Here is a site my buddie has to help you. Well co-owner..
https://www.quora.com/Why-is-fresly-prepared-FeSO4-required-for-the-ring-test
I googled it, here it is lol
Solvation describes the interaction of solvent with dissolved molecules.
Answer:
It's determined by the ability of one mineral to scratch another mineral.
