I am working on making Meads (Honey wine) and after speaking to a master Vinter he advised I lower the pH of my starting water & honey mixture to 3.5 for various reasons. I'm interested in experimenting to see if this gives a noticeable taste difference to the mead. I know honey is Basic but not horribly so (I think) so rather than sit with some litmus paper for lord knows how long to make things exact I figured I'd just add the mathematical amount required to get water to that level since the experiment is more about what is observable. That said How much Citric acid (Dry white crystalline powder) do I add to make 1 gallon of water 3.5 pH? To make 5 gallons I would just multiply that number by 5, yes? Thank you.