Chemical Equilibrium (ICE)

How far does a reaction actually go? Set the equilibrium constant and starting amounts and watch the reaction settle to its balance point.

Chemical Equilibrium (ICE)Live

how far a reaction goes

Controls

Presets

Equilibrium constant K

Initial [A] (M)

Initial [B] (M)

For A + B ⇌ C + D, the reaction proceeds until the ratio of products to reactants equals K. A large K means products dominate; a small K means the reaction barely proceeds. The extent x is found by solving the equilibrium expression. Educational tool.

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Data Inspector

Extent of reaction x0.667

[A], [B] at eq.0.333, 0.333 M

[C], [D] at eq.0.667 M

Governing equation

K_{e q} = \frac{[ C ] [ D ]}{[ A ] [ B ]} = \frac{( 0.667 ) ^{2}}{( 0.333 ) ( 0.333 )} = 4

Reading this result: With K = 4, reactants and products coexist; the reaction proceeds to an extent x = 0.67.

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How it works

At equilibrium, the ratio of product to reactant concentrations equals the constant K. For A + B ⇌ C + D the extent of reaction x solves K = x²/((A₀−x)(B₀−x)). A large K drives the reaction toward products; a small K leaves mostly reactants. Educational tool.

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Frequently asked questions

Is this equilibrium ICE table calculator tool really free?▾

Yes. Chemical Equilibrium (ICE) runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.

Do I need to install anything?▾

No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.

Can I save or share my simulation?▾

Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.

How accurate are the results?▾

The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.