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CHEMISTRY / CHEMICAL KINETICS

Reaction Order from Initial Rates Calculator

Estimate a reactant order from two experiments where only its concentration changes. Review the equation, substituted values, assumptions, and result in one guided chemistry workspace.

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

Conversion input

Known value

Filter by unit name, symbol, or code. Your current selections remain available.

Preparing the calculator...

Use boundary

Calculation path

Estimate a reactant order from two experiments where only its concentration changes. 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

n=ln(r2/r1)/ln([A]2/[A]1)

What you provide

What you provide

  • First measured rate, using the same scenario as the other inputs
  • Second measured rate, using the same scenario as the other inputs
  • First concentration expressed in mol/L, using the same scenario as the other inputs
  • Second concentration expressed in mol/L, using the same scenario as the other inputs

What you receive

What you receive

  • Estimated reaction order 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.

Temperature and other reactant concentrations are constant and the same rate law applies.

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

Reviewed reference factors

Reviewed reference factors