The Kilcher Homestead is a 600 acre Pioneer Homestead that has been protected for perpetuity via a ConservatIon Easement. The Kilcher Family has also preserved the Historic Cabin and site as a LIving Museum.
Yes, negative pH is possible, but not in water as a solvent. The range of pH in water is 0 to 14 (to be more precise, it is -1.7 to 15.7, but for simplicity's sake, we start with the usual values.) Thus, what pH indicates is the ability of the acid to form H3O+, which can then donate a proton.
Our group, The pHinators, measured how soil affects the pH of water. pH is defined as the negative side of logarithm of the hydrogen ion that is concentrated. The pH scale goes from 1 to 14 with 1 being the most acidic and 14 being the most basic and 7 is neutral.