Concentration Formula:
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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.
The calculator uses the formula:
Where:
Explanation: The aqueous phase concentration is divided by the Henry's law constant to determine the equilibrium gas phase concentration.
Details: Understanding this relationship is crucial for environmental modeling, chemical engineering processes, and atmospheric chemistry studies.
Tips: Enter the aqueous phase concentration in mol/m³ and the dimensionless Henry solubility constant (default 1). All values must be > 0.
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).