Education Technology

Science: Forensics Case 7 - Drug Tests: Identifying an unknown chemical
by Texas Instruments

Published on June 17, 2010

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.