### Residual Alkalinity prediction from recipe

Posted:

**Fri Mar 05, 2010 6:10 pm**I don't think I've asked for this feature before, but some recent work by Kai Troester has re-stimulated my interest in it, so excuse me if I'm repeating myself here.

I use separate spreadsheets and graphs to predict the Residual Alkalinity (RA) requirement for my water to hit the correct mash pH. Then I use BTP to determine the salt additions needed to hit that RA. I'd find it very much simpler to have that RA prediction made within BTP.

This page shows the formulas Kai derived from his experiments and has a pair of tables at the end that show results from these equations. Essentially he has expanded on the material that John Palmer has been promoting by including the differential effects of roasted and crystal malts on the SRM effect on pH. There is a spreadsheet that includes these calculations here.

It would be great if somewhere on the recipe or schedule page or in the water chemistry window there was a note saying "Suggested RA = X".

I use separate spreadsheets and graphs to predict the Residual Alkalinity (RA) requirement for my water to hit the correct mash pH. Then I use BTP to determine the salt additions needed to hit that RA. I'd find it very much simpler to have that RA prediction made within BTP.

This page shows the formulas Kai derived from his experiments and has a pair of tables at the end that show results from these equations. Essentially he has expanded on the material that John Palmer has been promoting by including the differential effects of roasted and crystal malts on the SRM effect on pH. There is a spreadsheet that includes these calculations here.

It would be great if somewhere on the recipe or schedule page or in the water chemistry window there was a note saying "Suggested RA = X".