CHEMISTRY / EQUILIBRIUM

Equilibrium Constant Calculator

Calculate Kc for the model reaction A plus B reversibly forming C plus D. Inspect the chemical relationship, substituted values, result, assumptions, and unit convention in one guided workspace.

01 Calculated in this tab
02 Values stay in this browser tab
03 Use boundary

Use boundary

Calculation path

Calculate Kc for the model reaction A plus B reversibly forming C plus D. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

K_c = [C][D]/([A][B])

What you provide

Equilibrium concentration A expressed in mol/L, using the same scenario as the other inputs
Equilibrium concentration B expressed in mol/L, using the same scenario as the other inputs
Equilibrium concentration C expressed in mol/L, using the same scenario as the other inputs
Equilibrium concentration D expressed in mol/L, using the same scenario as the other inputs

What you receive

Concentration equilibrium constant from the stated equation
A symbolic formula plus substituted working with your values
Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

The entered concentrations are equilibrium activities approximated by molar concentrations and all coefficients equal one.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

OpenStax Chemistry 2e: Equilibrium constants

Equilibrium Constant Calculator

Calculation path

What you provide

What you receive

Choose the maximum decimal places shown. This does not increase source accuracy.

Reviewed reference factors

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