Final answer:
The pH scale describes the negative log of the hydrogen ion concentration in a solution, an acid donates a proton while a base accepts a proton, water dissociates into H+ and OH- ions, and a neutral solution has equal concentrations of H+ and OH- ions.
Step-by-step explanation:
The pH scale describes the negative log of the percent H+ ion in a solution.
An acid will donate a proton and a base will accept a proton.
Water will dissociate into H+ and OH- ions.
A neutral solution will have an equal concentration of H+ and OH- ions.