# Why do some acids have pH 8? [closed]

Is it necessary for an acid to have pH less than 7? If no, please elaborate with examples.

If you have an acid that appears to be generating less than $10^{-6}$ mol/l solvated protons from the acid, or a base generating less than $10^{-6}$ mol/l hydroxide ions, then water autodissociation remains appreciable. You then need to look at both water dissociation and acid or base dissociation. When you do, you properly get pH below 7 for an acid, or above 7 for a base.