The Ionization Constant of Water

pKw ≡ -log10(Kw)

—— A web computational tool ——

Negative logarithm (base 10) of the ionization constant of water, Kw, can be
calculated at temperatures of 0-800 oC, pressures of 1-10000 bar, and densities of 0-1.25 g cm-3

The water properties are calculated by IAPWS-95 EOS (Wagner and Pru╬▓, 2002).

Input options




t / oC:
P / bar
ρH2O / g cm-3
Outputs
pKw(sc or use ρ)
pKw(l)
pKw(v)
Psat / bar
ρH2O(sc) / g cm-3
ρH2O(l) / g cm-3
ρH2O(v) / g cm-3



© 2014 Electrochemical Technologies
EMS Energy Institute, John and Willie Leone Family Department of Energy and Mineral Engineering
The Pennsylvania State Univerisity