The relationship between the concentration of H3O+ and the
concentration of OH- shows a very consistent pattern.
|That pattern can be expressed mathematically by saying that the product of
the concentration of H3O+ times the concentration of OH-
remains a constant value of 1.0 x 10-14.
That value has both a name and a
symbol. It is variously called the ion product constant for water,
the ionization constant of water,or simply the water constant.
The symbol is Kw. You should write down this relationship in
|[H3O+] x [OH-] = 1.0 x 10-14
|[H3O+] x [OH-] = Kw
This equation for the ionization constant of water can be used in anumber of
calculations, as you will see next.
Top of Page
Back to Course Homepage
Clackamas Community College
©1998, 2002 Clackamas Community College, Hal Bender