Reaction Order Calculator
Enter two experimental rate measurements to find the reaction order for each reactant and the rate constant k.
Experimental Data
Enter concentrations and rates for two experiments. Use consistent units throughout.
| Experiment | Rate |
|---|
All concentrations in mol/L. Rate units can be any consistent unit (mol/L·s, M/s, etc.).
Enter data and click Calculate
Results
Rate Law
Overall Order
Rate Constant k
k from Exp 1: |
k from Exp 2:
Summary
Enter two experimental rate measurements to find the reaction order for each reactant and the rate constant k.
How it works
- Enter the initial concentration of each reactant for Experiment 1 and Experiment 2.
- Enter the measured initial rate for each experiment (in the same units).
- Click "Calculate" to run the method of initial rates.
- The tool computes the order for each reactant by comparing the two experiments.
- The overall reaction order and rate constant k are displayed with the full rate law.
Use cases
- Determine reaction order from a two-experiment kinetics dataset in general chemistry.
- Verify hand-calculated method-of-initial-rates results on homework problems.
- Calculate the rate constant k once reaction orders are known.
- Explore how changing concentrations between experiments affects the derived order.
- Prepare for AP Chemistry or university physical chemistry kinetics units.
- Check stoichiometry vs. experimentally derived orders.
Frequently Asked Questions
Last updated: 2026-06-13 ·
Reviewed by Nham Vu