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My most recent shocker is the discovery that the revered Henderson-Haslebach equation is effectively quasi-empirical if the data and data ranges and ion pairs are not duly cherry picked. Before that the biggest shocker was that Kolbach's 'RA' is even more quasi-empirical. So even attempts at...

I've written extensively upon this subject within this forum, so I don't intend to sound like a broken record (for those who might remember what that even is) here, but: When the critically combined (as in simultaneous) data for both DIpH and BC is highly rare to begin with (and wherein one...

The moral of this story is that if the hallowed foundational math model presumptions of the very science of Chemistry itself are highly flawed, then how is one to presume that via using such models one can design an accurate software tool for Mash pH prediction? If the bedrock math model of...

Do you have an analysis for your water before it goes through the softener?

Well, I did cautiously preface this as a "simplified means". Here are a few juicy tidbits from the paper: As the scope of its application expanded, however, the approximate nature of the Henderson– Hasselbalch equation faded out of curriculum. None of the textbooks of general or biochemistry...

Might this be softened water?

As it turns out, the H-H equation is in essence a rather simplified kludge of sorts which can be off by as much as 50% in its pH predictions in some specific cases, as can be seen here: The Henderson-Hasselbalch Equation: Its History and Limitations - PDF Free Download Per this 5 page peer...

10^1.1 = 12.59 (rounded) 12.59 : 1 for HCO3- to H2CO3 infers 1 : 12.59 for H2CO3 to HCO3-, or 1/12.59 for H2CO3. 1/12.59 = 0.0794 And when one goes up the 'Y Axis' to meet the value of 0.0794 and then moves horizontally to the right by which to intersect the H2CO3 line, the intersection...

Factually the equation expresses merely a mole fraction ratio, as stated directly within, so with the presumption of 6.4 as the constant (whereby I now prefer 6.37 as more correct) the equation (which does not originate from me) is correctly yielding a ratio of 12.59 times more molar HCO3- than...

It may be that Martin Brungard's contribution to the book was more in the capacity of editor, but he would need to clarify as to whether or not he additionally contributed in the direct capacity of providing math/science input.

You may well be correct, and I applaud your determination and effort here. I'm certainly no expert on Henderson-Hasselbalch, and at this juncture I've forgotten most of what I formally learned of it. Clearly someone better versed and more up to date in the practical application of HH needs to...

Either one.

This water looks a lot like RO water.

I've discovered that some digital thermometers are thrown off kilter by the presence of an electromagnetic field.

My university level chemistry textbooks date to the early 70's at best. There are certainly more up to date books out there today.

I don't have any books to recommend. I'm sure others will be able to help here.

It evolves from Ka's (dissociation constants) and pKa's [whereby pKa = -log(Ka)] and an arrangement (or rearrangement) of the Henderson-Hasselbalch equation which states: pH = pKa + log [base/acid] (where base and acid are molar concentrations). You will often see this as pH = pKa + log...

Without much dwelling upon it (as in tweaking), this quickly gets one into the general ballpark. The only issue (albeit a major one) is to get the Calcium Carbonate to fully dissolve. Natural water such as this has had many years (to put this mildly) of direct contact exposure to a surrounding...

From the chart above (see where 0.10, or 10%, hits the HCO3- line at pH 5.4), and from this (which is the formula which draws the HCO3- curve seen on the chart): Water's pH = 6.40 + log(mol fraction of HCO3- to H2CO3) 5.40 pH = 6.40 + log(mol fraction of HCO3- to H2CO3) -1.00 = log(mol...

There is a minor (and fully inconsequential with regard to targeting pH 5.4) mistruth within my post #6 above. Due to it's poor dissociation at pH 4.3 (which is a consequence of pH 4.3 approaching Lactic Acids pKa1 value of 3.86) 88% Lactic Acid only exhibits an acid Strength of 8.644 mEq/mL at...