Is there a hypernym for acidity and basicity?

I was wondering if there was a single word for what the pH scale measures, with no particular bias to either the acidic end (acidity) or basic end (basicity) of the spectrum. From Wikipedia:

In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or basicity (alkalinity) of an aqueous solution

I could not find a single word term that encompassed both acidity and basicity (or alkalinity) in the article or elsewhere , which could be used as follows:

In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the _______ of an aqueous solution

Solution 1:

A more generic term would indeed be an improvement over acidity, which for chemists is nonetheless like altitude and carries no bias when used. Same for basicity, which just doesn't happen to be a popular term. Alkalinity also refers to the entire pH range but indeed favors higher-pH occasions. Also too bad is that high acidity means low pH.

Solution 2:

In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the lability of an aqueous solution

"Lability" is often used in reference to proton exchange with acids, bases. A proton that is "highly labile" is said to dissociate from a compound easily, while "low lability" would refer to a Bronsted-Lowry base (i.e. the base wants to keep it's protons and therefore does not lose them easily).

Wikipedia doesn't have much on it but feel free to read anyway: https://en.wikipedia.org/wiki/Lability

So I might say, "This compound would make a great acid because it has a proton that is very labile." Of course, the actual effects of acidity and basicity depend on what else is in solution but I think you get it.