In Lab #1 of the 2013 AP Chemistry lab book published by AP Central, the student is directed to measure % transmittance (%T) of a series of solutions of blue 1 food dye.

When using a Colorimeter, Logger Pro 3 defaults to displaying both %T and absorbance, and the default graph is set up to plot absorbance vs. time. To hide the absorbance readings and set the data collection mode to Events with Entry requires a fair amount of work before students use Logger Pro 3 to collect data.

Thus, we have prepared a special Logger Pro 3 file to use with this experiment. Download the file at: