Advanced Chemistry Through Inquiry Teacher Guide


Teacher manual for AP* and Advanced Chemistry labs. Has both the printed version and a flash drive with teacher tips, a PDF of teacher version and editable Word student version.

Empirical Formula (Colorimeter Version)

Lab Summary

A major emphasis of laboratory work for a chemist is determining the composition of a compound. There are many tools, such as chromatographic separation and spectroscopy, that aid the chemist in determining chemical composition. By keeping track of mass and breaking a compound into its component pieces, the pieces can be measured and the composition determined.

How do you discover the formula for an unknown substance?


The student is able to use stoichiometric calculations to analyze the results of a reaction carried out in the laboratory.


The student is able to use data from synthesis or decomposition of a compound to confirm the conservation of matter and the law of definite proportions.

Sensors / Equipment Used:

PASPORT Colorimeter Sensor


Our PASPORT Colorimeter records all 4 wavelengths simultaneously--no need to guess at wavelength to get a quality measurement.

The Associated Bundle:

Chemistry Standard Sensor Bundle


Contains the sensors and probes needed to perform all 17 experiments in the Advanced Chemistry Teacher Guide and all 25 labs in the Chemistry through Inquiry Guide.

Interface Required

This experiment may require software and an interface for data collection.