# How can a spectroscopic measurement be used for rates of reactions?

Oct 22, 2015

Yes, Using a Spectrophotometer for example.

#### Explanation:

The best example of using spectroscopic data to track the reaction rate is using a spectrophotometer, where we can use Beer-Lambert law $A = \epsilon \times l \times C$ to calculate the concentration of a reactant consumed or a product formed at different time intervals, and therefore, determining the reaction rate.

$R a t e = k {\left[R e a c \tan t\right]}^{n}$

Here is a full lab experiment on how to determine the rate of the reaction using a spectrophotometer:

AP Chemistry Investigation #11: Rate Law of the Fading of Crystal Violet.