pH changes when fermenting and distilling

[PeeGee]

Not sure if this topic is under the right forum BUT
Does the pH change when a wash is fermenting?
Does the pH change when a wash is distilled?

[orcy]

The ph will drop during fermentation. Mostly driven by the production of co2. I don't believe it changes much on distilling.

[spiltdrink]

Some people use shell grit in their ferments to regulate their pH when doing sugar washes. Not sure about the All grain guys, maybe some one could chime in.
When the fement gets more acidic it eats away at the shell releasing calcium into the wash and raising the pH back to where the yeasties like it. You have to find what amount works for you.

I would have assumed that distilling lowers the pH as backset (already distilled wash) is renowned for its acidity.
Used in sour mashes and cleaning copper.