I use 95% ethanol to remove residual water from my brewing bottles after disinfecting, if they have stains, with sodium hypochlorite (household bleach). I know little about the qualities of tap water supplied to us, other than it is very hard, contains a lot of what is here called alkali. Clear glass not dried manually after wetting is left with white spots.
I note that the ethanol, after acquiring some percentage of water in solution, certainly less than perhaps 10%, has become cloudy and translucent.
Can this be due to alkali being released from solution with the water, and remaining in suspension? If so, might it be possible to use the concept to soften this type of hard water?
Thank you for reading!
Testing the waters is an old trick. Drowning in them might result.