Education Technology

Forensics Case 7 - Drug Tests: Identifying an unknown chemical

Published on 06/17/2010

Activity Overview

In this activity, students distinguish between physical and chemical properties. They also understand the differences between qualitative and quantitative observations. They use quantitative and qualitative analyses to identify an unknown powder.

Key Steps

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    Using a conductivity probe measuring in microsiemans, solutions of known powders are compared with the unknown powder.

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    The pH of the solutions containing the known powders are measured comparing the pH of the unknown powder.