Second Order Reaction Calculator
Calculate concentration and concentration-dependent half-life for the explicit disappearance law −dC/dt=kC².
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Result
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Calculation steps
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How to calculate
Integrate the specified second-order concentration disappearance law without silently inserting a reaction stoichiometric factor.
C(t)=C0/(1+k C0 t); half-life=1/(k C0)
Worked example
C0=0.1 mol/L, k=0.5 L/(mol s) and t=60 s give C=0.025 mol/L and first half-life 20 s.
Assumptions and input details
Constant-volume irreversible single-species disappearance, fixed k and ideal concentration. k is the coefficient in the displayed −dC/dt law; a 2A stoichiometric rate definition may use a different factor. No competing reactions, temperature dependence or fitted rate uncertainty.
Unit definitions
Unit selection is independent of language. Each selector contains only units for its physical quantity. Calculations use defined base units internally.
Using this calculator
Can I enter my own problem?
Yes. Replace the example values with your own inputs. The result, calculation steps, tables and applicable diagrams update from those inputs. Blank or invalid values clear the result; example values are never silently substituted for missing inputs.
Are the results exact?
Results use floating-point arithmetic and displayed rounding. Read the formula, assumptions and any stated data precision before interpreting the result.
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The calculation runs in your browser. No account, file upload or external AI service is required. Inputs are not saved between page reloads.
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