Suppose you will determine the composition of the unknown substance that was collected at the scene of the crime. You are encouraged to work on this case. You can perform a series of tests on the unknown substance and compare results of the same tests performed on known samples. Follow these steps: List physical properties you can use as a simple method of identifying substances.

Describe how you can use density to help identify unknown substances.

Explain how forensic chemist can help you identify unknown substances.

How important is comparing tests results of know substances in a lab setting?