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`Rate = k*[A]`

Enter a value for all fields

The **First-order Rate Law ** calculator computes the reaction rate of concentration change of a substance based on a Rate Law equation, the initial concentration (**A _{0}**) and the rate constant (

**INSTRUCTIONS:** Choose the preferred units and enter the following:

- [
**A**] Initial Concentration of Substance_{0} - (
**k**) The rate constant

**Reaction Rate:** The calculator returns the rate of reaction of the substance moles per liter per second (mol/(L*s) ).

- Zero Order
**Rate Law (Integral form)** - Zero Order
**Half Life** - Zero Order
**Rate Law** - First Order
**Rate Law (Integral form)** - First Order
**Half Life** - First Order
**Rate Law** - Second Order
**Rate Law (Integral form)** - Second Order
**Half Life** - Second Order
**Rate Law**

The **first-order rate law equation ^{[1]}** calculates the rate at which the products get converted to reactants, such that the rate depends on a concentration of only one reactant. The equation shown above is the differential

The equation is

**Rate=k[A] ^{1}=k[A] ^{[2]}**

where

**Rate**is the rate of the first order reaction in units of (Molarity/time)**k**is the rate constant of the reaction in units (1/time)**[A]**is the concentration of the reactants in units of (mol/L)

- Khan Academy: Rate law and reaction order
- Rate and Order of Reactions

[1]https://en.wikipedia.org/wiki/Rate_equation

[2]Whitten, et al. 10th Edition. Pp. 626,629,631

[3]https://en.wikipedia.org/wiki/Differential_equation

[Picture] http://chemwiki.ucdavis.edu/Core/Physical_Chemistry/Kinetics/Reaction_Rates/First-Order_Reactions