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Rate Constant Calculator

Chemistry
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Calculates the rate constant (k), reaction rate, or substance concentration using the rate law equation.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Reaction Rate, Concentration of Reactant A, Concentration of Reactant B, Order of Reaction with Respect to A, and Order of Reaction with Respect to B in the units shown.

Step 2

Read Rate Constant (k) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Simple First Order

Reaction Rate: 0.02 M/s; Concentration of Reactant A: 2 M; Concentration of Reactant B: 1 M; Order of Reaction with Respect to A: 1; Order of Reaction with Respect to B: 0

Rate Constant (k): 0.01 M^(-(orderA + orderB) + 1) s^-1

Second Order

Reaction Rate: 0.04 M/s; Concentration of Reactant A: 2 M; Concentration of Reactant B: 1 M; Order of Reaction with Respect to A: 2; Order of Reaction with Respect to B: 0

Rate Constant (k): 0.01 M^(-(orderA + orderB) + 1) s^-1

Complex Reaction

Reaction Rate: 0.1 M/s; Concentration of Reactant A: 1.5 M; Concentration of Reactant B: 2 M; Order of Reaction with Respect to A: 1; Order of Reaction with Respect to B: 1

Rate Constant (k): 0.03333333333 M^(-(orderA + orderB) + 1) s^-1

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