logdrum
Well-Known Member
In my last several attempts to reduce/eliminate alkalinity from the mash liquor, I've ended up with a much lower mash pH than predicted. (Ex: starting water pH 7.6, CaCO3 105ppm, attempting to lower to 70ppm. Bru'n Water says .8 ml 86% phosphoric for 5.3 gal. Mash pH target 5.43, actual reading 5.19) Is there a formula to predict what adding .8 ml of 86% phosphoric acid to 5.3 gal of pH 7.6 water will net as a resultant pH? When I treat my sparge water, I have a target pH & will always add only about 1/2 the acid then drop by drop reach the target. I do treat the mash & sparge water separately. Perhaps I'm not phrasing my questions accurately, but it seems to me if I could target the predicted results of my acid addition, I could stop when I reach my target & the mash pH would be closer to my goal.