K_W: K\_W

In AquaEnv: Integrated Development Toolbox for Aquatic Chemical Model Generation

Description

PUBLIC function: calculates the ion product of H2O

Usage

K_W(S, t, p=0, SumH2SO4=NULL, SumHF=NULL, khf="dickson", khso4="dickson")

Arguments

S	salinity in practical salinity units (i.e. no unit)
t	temperature in degrees centigrade
p	gauge pressure (total pressure minus atmospheric pressure) in bars
SumH2SO4	total sulfate concentration in mol/kg-solution (calculated from S if not supplied)
SumHF	total fluoride concentration in mol/kg-solution (calculated from S if not supplied)
khf	S, t relation for K\_HF needed for scale conversion: either "dickson" (default, Dickson1979a) or "perez" (Perez1987a)
khso4	S, t relation for K\_HSO4 needed for scale conversion: either "dickson" (default, Dickson1990) or "khoo" (Khoo1977)

Value

the ion product of H2O in (mol/kg-solution)2 on the free proton pH scale

Author(s)

Andreas F. Hofmann. Maintained by Karline Soetaert ([e-mail]).

References

Millero1995 (SWS pH version), DOE1994 (cites Millero1995), Zeebe2001

Examples

K_W(35, 15)
K_W(35, 15, 10)
K_W(S=35, t=15, p=10, SumH2SO4=0.03)
plot(K_W(35, 1:25), xlab="temperature / degC")

Example output

[1] 1.996719e-14
attr(,"unit")
[1] "(mol/kg-soln)^2"
attr(,"pH scale")
[1] "free"
[1] 2.01836e-14
attr(,"unit")
[1] "(mol/kg-soln)^2"
attr(,"pH scale")
[1] "free"
[1] 1.998343e-14
attr(,"unit")
[1] "(mol/kg-soln)^2"
attr(,"pH scale")
[1] "free"

AquaEnv documentation built on May 1, 2019, 9:09 p.m.