First-Order Reaction Final Concentration Tool – Calculate [A]ₜ



Reaction Parameters
Results
Final Concentration [A]t
0.00
Formula [A]t = [A]0 × e-kt
Reaction Order First Order (n=1)

About First-Order Final Concentration Calculator

When a first-order reaction continues over time, the concentration of its reactant gradually falls. Knowing the final concentration helps us understand how much of the original substance is still present after a particular period.

A First-Order Final Concentration Calculator uses the integrated first-order rate law to make this calculation easier. You normally need three values: the initial concentration, the rate constant, and the reaction time. From these values, the calculator determines the concentration remaining at the chosen time.

The calculation is commonly based on ln([A]ₜ/[A]₀) = −kt. This tool is useful for chemistry students studying chemical kinetics, reaction rates, and concentration changes. It can also save time when checking homework or working with experimental data from a laboratory.