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THE FEUTEX TOOLKIT

Second-Order Reaction Progress

Calculate concentration and half-life for a single-reactant second-order rate law.

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FormulaRemaining concentration = initial/(1+k*initial*time); Half-life = 1/(k*initial)
Sources and model references

Worked example

Inputs

Initial concentration
1 mol/L
Rate constant
0.2 L/(mol·s)
Elapsed time
5 s

Expected results

Remaining concentration
0.5 mol/L
Half-life
5 s

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Calculate concentration and half-life for a single-reactant second-order rate law.
  2. Set initial concentration, rate constant, elapsed time in the indicated units.
  3. Calculate and compare remaining concentration, half-life.

Try this example

{
  "initial": 1,
  "k": 0.2,
  "time": 5
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.