How to use the reaction order from rate data calculator
Find the order of a reaction with respect to a reactant from two rate measurements at different concentrations. Enter rate in experiment 1, rate in experiment 2, concentration in experiment 1, concentration in experiment 2 in the fields above; the reaction order, rate law form are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “reaction order calculation”, “rate law from experiments”, “order from initial rates”, “calculate reaction order from rate data”, “find reaction order”.
Formula
Variables
- r1 — Rate in experiment 1 (M/s)
- r2 — Rate in experiment 2 (M/s)
- c1 — Concentration in experiment 1 (M)
- c2 — Concentration in experiment 2 (M)
Worked example
With rate in experiment 1 = 0.02 M/s, rate in experiment 2 = 0.08 M/s, concentration in experiment 1 = 0.1 M, concentration in experiment 2 = 0.2 M, the calculator gives reaction order ≈ 2; rate law form ≈ rate = k[A]^2 text.
Frequently asked questions
What is the reaction order from rate data calculator used for?
Find the order of a reaction with respect to a reactant from two rate measurements at different concentrations. It helps with questions such as “reaction order calculation”, “rate law from experiments”, “order from initial rates”.
What is the formula for the reaction order from rate data calculation?
Reaction order = ln(r2 / r1) / ln(c2 / c1). Rate law form (text) = "rate = k[A]^"+[Reaction order]. Here r1 is rate in experiment 1 (M/s), r2 is rate in experiment 2 (M/s), c1 is concentration in experiment 1 (M), c2 is concentration in experiment 2 (M).
What inputs do I need for the reaction order from rate data calculator?
You need rate in experiment 1 in M/s, rate in experiment 2 in M/s, concentration in experiment 1 in M, concentration in experiment 2 in M. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the reaction order from rate data calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the reaction order from rate data result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.