modelWaterSelfIonization

H2O <-> OH- + H+
Diagram of WaterSelfIonization

Extends from Modelica.Icons.Example (Icon for runnable examples).

Information

Self-ionization of water.

Ions difference (SID) in water causes the acidity/basicity, where pH = -log10(aH+). An activity of hydrogen ions aH+ is approximated with concentration (mol/l) of the oxonium cations H3O+.

plotExpression(apply(-log10(WaterSelfIonization.H3O.solute)), false, "pH", 1);


The titration slope der(pH)/der(SID)=1.48e+6 1/(mol/L) at pH=7.4.

Components

TypeNameDefaultDescription
Chemical.Obsolete.Components.Solutionsolution
Chemical.Obsolete.Components.Solutionsolution1
Chemical.Obsolete.Components.SubstanceH3O
Chemical.Obsolete.Components.SubstanceOH
Chemical.Obsolete.Components.SubstanceH2O
Chemical.Obsolete.Components.ReactionwaterDissociation
RealpH
RealpH3O
Chemical.Obsolete.Components.SubstanceH_
Chemical.Obsolete.Components.SubstanceOH_
Chemical.Obsolete.Components.SubstanceH2O_
Chemical.Obsolete.Components.ReactionwaterDissociation_
Modelica.Fluid.Systemsystem

Revisions

2014-2018

Marek Matejak, Charles University, Prague, Czech Republic