Simple Calculation

Here, the model determines the state of a system containing water, and two or more ions, at equilibrium with an atmosphere of known temperature and relative humidity. Solids are allowed to form, at the choice of the user, but partitioning of trace gases into the vapour phase is not enabled.

• Inputs: ambient relative humidity (expressed as a fraction), temperature, and the moles of each ion present.
• Outputs: the amounts of liquid water, dissolved ions, and solids present at equilibrium. The partial pressures or partial pressure products of any HCl, HNO3, HBr, or H2SO4 that would be in equilibrium with the condensed phase are also reported.
• Options: control of the formation of solids, and equilibration of the system to the water vapour pressure above ice.

Specify the problem in the input fields below.