peebee
Out of Control
Aye, and I can't expect to start on a "one-man band" (and I understand he might start up again soon?). The "as CaCO3" is so prevalent I don't really think it'll change for Alkalinity. So, homebrewers will continue to make mistakes with it. But mistakes will certainly be reduced if I can persuade hordes of brewers to dump useless "Hardness". Even then some water authorities will insist on veiling some very vital brewing water info behind flippin' "Hardness".My Phoenix Analytical water analysis reports Total Alkalinity as CaCO3, mg/L
To convert from Alkalinity "as CaCO3" to as bicarbonate multiply the "as CaCO3" value by 1.22. The inverse (other way about) is 0.82, else divide by 1.22.
Comes from molar weights of CaCO3 (100) and HCO3 (61). But as there are two bicarbonate ions with calcium (only one carbonate ion), divide the 100 by 2: 61/50=1.22 or 50/61=0.82. And never forget "equivalence" values (i.e. "as") are imaginary, not real (especially remember if dealing with the daft "as CaCO3".
As predicted yesterday my astonishing (to me!) mathematical abilities are waning! My confidence writing out this stuff is going downhill ... I'll be back to "chimp" status very shortly