Different solvents have different pH scales. For example in acetonitrile (a widely used solvent on organic and analytical chemistry) the neutral pH is ca 19, in sulfuric acid ca 1.5. The pH values in different solvents, expressed in their own scales, are absolutely noncomparable.

Are solvents acidic or basic?

In this discussion the solvents are classified as amphoteric (both acidic and basic), acidic (in which the acidic properties are much more prominent than the basic), basic (in which the reverse is true), and aprotic (in which both acidic and basic properties are almost entirely absent).

How do you find the pH of a solvent?

A simple extraction procedure using water is recommended for measuring the pH of non-aqueous solutions containing water- immiscible solvents. Water is added and mixed thoroughly with the sample. After reaching equilibrium, the solvent phase is separated and the pH of the water phase is then measured.