Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Partial pressure (atm)

Partial pressure of the gas above the liquid.

Concentration (mol/L)

Dissolved gas concentration at equilibrium; must be greater than zero.

Derive Henry's law constant H = P / C from the partial pressure and dissolved gas concentration at equilibrium. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Henry constant (atm·L/mol)

Henry's law constant in atm·L/mol.

• Equilibrium expressions must match the balanced reaction and selected standard state. Concentrations or partial pressures may not equal activities at non-ideal conditions, and a calculated equilibrium constant does not describe how quickly equilibrium is reached.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

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