1. What is Concentration of Species in Gaseous Phase Calculator?

Definition: This calculator estimates the concentration of a species in the gaseous phase based on its aqueous phase concentration and dimensionless Henry solubility constant.

Purpose: It helps chemists and environmental scientists understand gas-liquid partitioning of chemical species.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( c_g \) — Concentration in gaseous phase (mol/m³)
• \( c_a \) — Concentration in aqueous phase (mol/m³)
• \( H_{cc} \) — Dimensionless Henry solubility constant

Explanation: The aqueous phase concentration is divided by the Henry's law constant to determine the equilibrium gas phase concentration.

3. Importance of Gas-Liquid Partitioning

Details: Understanding this relationship is crucial for environmental modeling, chemical engineering processes, and atmospheric chemistry studies.

4. Using the Calculator

Tips: Enter the aqueous phase concentration in mol/m³ and the dimensionless Henry solubility constant (default 1). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Henry's Law?
A: Henry's Law states that the amount of dissolved gas is proportional to its partial pressure in the gas phase at equilibrium.

Q2: What's a typical Henry constant value?
A: Values vary widely by compound. For example, oxygen in water has Hcc ≈ 30, while CO2 has Hcc ≈ 1.6 at 25°C.

Q3: When would I use this calculation?
A: Useful for predicting gas concentrations above aqueous solutions, designing aeration systems, or modeling environmental fate of chemicals.

Q4: How does temperature affect this?
A: Henry's constant is temperature-dependent. Higher temperatures typically decrease gas solubility (increase Hcc).

Q5: What units does this calculator use?
A: All concentrations are in mol/m³, and Henry's constant is dimensionless (ratio of mol/m³ gas to mol/m³ liquid).