Beer's Law

By: Scott Ahlers: Period 2

Pre Lab:

Before we could start our lab, we needed to know what we were looking for. We learned how to measure, and we learned what kind of solutions we were using. The problem in this lab is why Aunt Elda died. So to solve the mystery, we had to test all sorts of solutions.


1) Test solution using Logger Pro.

2) Record data after testing each solution.

3) Repeat steps 1-2 after each solution.

Scientific Definitions


In chemistry, a solution is a homogeneous mixture composed of only one phase. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.


a measure of the capacity of a substance to absorb light of a specified wavelength. It is equal to the logarithm of the reciprocal of the transmittance


the ratio of the light energy falling on a body to that transmitted through it


Below you will find the data we recorded, along with the graph we used on Logger Pro to figure out how much light the solutions let through.
Big image

Concentration: Transmittance: Absorbance:

0 100.22476265 -0.000975036437477

10 85.6441184998 0.067302456292

20 67.6085003662 0.169998697105

25. 7041345215 0.589997014589

28 52.4894470215 0.279928002518

30 49.7516253662 0.303192726455

40 36.1802259827 0.441528724852

50 31.5721408081 0.500695968959

60 25.3444684601 0.596116812638


After finishing the lab, we noticed the as the solution grew stronger, the transition and the absorbance got weaker. It turns out the doctor didn't give Aunt Elda to much anesthesia, but actually did not give her enough. The normal amount of anesthesia in 40%, the doctor gave her 25%. Therefore, she wasn't put under all the way and is now, dead.