Model III: Simple Calculations

Description and abstract
This is the principal E-AIM input page for Model III. Alternative types of calculation can be selected from the list below:

1. Simple (this page)	6. Parametric, varying:	(a) relative humidity, or total water
2. Comprehensive		(b) chemical composition
3. Aqueous solution
4. Batch
5. Köhler curves

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), 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, NH3, or H2SO4 that would be in equilibrium with the condensed phase are also reported.
Options: control of the formation of solids.

Specify the problem in the input fields below.

Other Chemical Components

The amounts of organic compounds present can be entered here. First, click the button to select compounds from the library or create new ones for this session.

H⁺:	NH₄⁺:	Na⁺:
SO₄²⁻:	NO₃⁻:	Cl⁻:

(NH4)2SO4	(NH4)3H(SO4)2	NH4HSO4
NH4NO3	NH4Cl	2NH4NO3 · (NH4)2SO4
3NH4NO3 · (NH4)2SO4	NH4NO3 · NH4HSO4	Na2SO4
Na2SO4 · 10H2O	NaNO3	NaNO3 · Na2SO4 · H2O
NaCl	Na3H(SO4)2	NaHSO4 · H2O
NaHSO4	NaH3(SO4)2 · H2O	Na2SO4 · (NH4)2SO4 · 4H2O

Model III: H⁺ - NH₄⁺ - Na⁺ - SO₄²⁻ - NO₃⁻ - Cl⁻ - H₂O, at 298.15 K

Simple Calculation

Ambient Conditions

Ionic Composition in Moles

Other Chemical Components

Solid Phases

Model III: H+ - NH4+ - Na+ - SO42− - NO3− - Cl− - H2O, at 298.15 K

Simple Calculation

Ambient Conditions

Ionic Composition in Moles

Other Chemical Components

Solid Phases

Model III: H⁺ - NH₄⁺ - Na⁺ - SO₄²⁻ - NO₃⁻ - Cl⁻ - H₂O, at 298.15 K