What is the shelf life of vinegar?

[Hello_Again]

@Christopher

If you leave NaOH solutions out long enough, they will become solutions of Na[sub]2[/sub]CO[sub]3[/sub] or even NaHCO[sub]3[/sub]. This might just be livable, and maybe even act as a source of carbon for some plant life (That’s just guessing). Definitely that was not a NaOH solution by the time they found it. I’m guessing your friend was not an analytical chemist.

more likely, she knows I am not an analytical chemist, and simplified it for me. Or maybe I’m just mistelling the story.