The acidity of a solution is dependent on the concentration of hydrogen ions. The pH scale measures this acidity.
Essential idea: The pH scale is an artificial scale used to distinguish between acid, neutral and basic/alkaline solutions.
pH = - log[H+(aq)] and [H+] = 10-pH.
A change of one pH unit represents a 10-fold change in the hydrogen ion concentration [H+].
pH values distinguish between acidic, neutral and alkaline solutions.
The ionic product constant, Kw = [H+][OH-]
= 10-14 at 298 K.
Applications and skills
Solving problems involving pH, [H+] and [OH-].
Students should be familiar with the use of a pH meter and universal indicator.
In Chapter 8.3