Simple. Fast. Useful.

Choose your tool

CHEMISTRY TOOL

Second Order Reaction Concentration Calculator

Use this online second order reaction concentration calculator with labeled inputs and a worked example. 1/[A]t = 1/[A]₀ + kt; t½ = 1/(k[A]₀).

â—‡ Browser only
0 lines · 0 characters
Ready when you are
Your results will appear here.
Copy or download your result below.

Your text stays on this device.

Favorites
Recently used
LESS BUSYWORK, MORE DONE

Three steps. That’s it.

A useful toolkit for text, data, images and calculations.

  1. 01

    Add your input

    Choose a tool, enter values or select a file.

  2. 02

    Make it yours

    Adjust the options and run the action.

  3. 03

    Take the result

    Copy the result or download its file.

second order kinetics calculator online

Use second order reaction concentration calculator online with the chemical quantities shown below. Rate law −d[A]/dt = k[A]²; other second-order stoichiometric conventions may differ.

How to use it

Enter Initial concentration (mol/L). Set Second-order rate constant (L/(mol·s)), Elapsed time (s). Select Calculate, check the result units, then copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
Initial concentration (mol/L)Main input. Decimal or scientific notation. Positive values only. 1
Second-order rate constant (L/(mol·s))Option. Decimal or scientific notation. Positive values only. 0.1
Elapsed time (s)Option. Decimal or scientific notation. Zero or positive values. 10

Calculation method

1/[A]t = 1/[A]₀ + kt; t½ = 1/(k[A]₀)

Worked examples

Worked case for second order reaction concentration calculator. Rate law −d[A]/dt = k[A]²; other second-order stoichiometric conventions may differ.

Second Order Reaction Concentration Calculator — example with explicit inputs

Settings: Second-order rate constant (L/(mol·s)): 0.1; Elapsed time (s): 10

Input:

1

Expected result for the example input and options:

Output:

{
  "concentration_mol_L": 0.5,
  "half_life_s": 10
}

Limitations and common mistakes

  • Rate law −d[A]/dt = k[A]²; other second-order stoichiometric conventions may differ.
  • Match every input to its displayed unit; scientific notation such as 1e-6 is accepted.
  • Check substance identity, reaction coefficients and concentration conventions. Numerical output does not verify experimental conditions.

Frequently asked questions

How can I use second order kinetics calculator online?

Enter Initial concentration (mol/L). Set Second-order rate constant (L/(mol·s)), Elapsed time (s). Select Calculate, check the result units, then copy or download the JSON result.

Which model does Second Order Reaction Concentration Calculator use?

1/[A]t = 1/[A]₀ + kt; t½ = 1/(k[A]₀). Rate law −d[A]/dt = k[A]²; other second-order stoichiometric conventions may differ.

Technical references

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

Useful next tools

Explore other tools

Open a tool below, use the search, or choose a category to browse its full collection.