Reaction Order Calculator
Determine the reaction order from concentrations and rates of two experimental runs.
Calculation Parameters
Adjust the values below.
Calculated Result
When concentration is doubled, reaction rate quadrupled, resulting in a second-order reaction.
Expert Tip
Ensure units are correctly formatted (e.g. Kelvin for gas temperatures and liters for volumes) to get chemically accurate outputs.
How this Calculator Works
This calculator allows you to solve Reaction Order problems dynamically. Adjust the input parameters using the sliders or selection menu below:
- Concentration [A]₁ (M) (Range: 0.01 to 2.00, Default: 0.10)
- Initial Rate 1 (M/s) (Range: 0.0001 to 1.0000, Default: 0.0020)
- Concentration [A]₂ (M) (Range: 0.01 to 5.00, Default: 0.20)
- Initial Rate 2 (M/s) (Range: 0.0001 to 5.0000, Default: 0.0080)
The results are computed instantly and updated in the results panel on the right.
Formula & Methodology
Where:
- Concentration [A]₁: Parameter value.
- Initial Rate 1: Parameter value.
- Concentration [A]₂: Parameter value.
- Initial Rate 2: Parameter value.
Step-by-Step Calculation Example
To calculate Reaction Order manually, follow these steps:
- Identify the input parameters. For example:
- Concentration [A]₁ (M) = 0.10
- Initial Rate 1 (M/s) = 0.0020
- Concentration [A]₂ (M) = 0.20
- Initial Rate 2 (M/s) = 0.0080
- Apply the formula:
n = ln(Rate2 / Rate1) / ln([A]2 / [A]1)
- Verify the calculated value which is updated instantly in the results panel on the right.
Frequently Asked Questions
What is overall reaction order? ▼
Overall reaction order is the sum of exponents (m + n) of reactant concentrations in the experimental rate law: Rate = k [A]^m [B]^n.
How is reaction order determined experimentally? ▼
Reaction order is determined using initial rate methods by systematically varying one reactant concentration while keeping others constant.
Can reaction order be zero or fractional? ▼
Yes, reaction order can be zero, fractional, or negative depending on reaction mechanism steps.