The Research Box: High School
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Write down the three unknown solutions or solids as test samples. These will serve as the basis for all subsequent experiments, observations, and analyses aimed at identifying the substances.
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Description
Objective: The worksheet is structured as a motivating chemistry puzzle (based on the escape room concept). Students assist a professor in the lab in deciphering the mixed-up labels of three unknown liquids/substances (samples A, B, and C) using systematic, experimental identification tests.
Content and Methods: The activity combines theoretical preliminary considerations, experimental analysis, and cooperative quality assurance to investigate various classes of substances in aqueous solution. Students compare solutions/substances, formulate hypotheses about particle behavior, and analyze the samples through experiments. The results are reviewed as part of a peer-review process and subsequently theoretically justified through transfer tasks at the particle level.
Competencies:
- Subject-specific competence: Applying knowledge of substance properties to identify unknown substances
- Knowledge Acquisition: Independently sketching and labeling experimental setups, as well as implementing a qualitative analysis strategy
- Media Competence: Approaching scientific problems
- Language Competence: Formulating a logically consistent detective report using specialized chemical terminology
Target Audience and Level: High school