The Research Box

by to-teach Team

9 pagesMiddle schoolChemistry

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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 (samples A, B, and C) using systematic, experimental identification tests.

Content and Methods: The content is conveyed by combining a digital problem-solving task with qualitative identification experiments: Guided by an audio guide, students gather relevant information and examine the unknown liquids for their solubility, acid-base and redox behavior, and evaporation properties. The results are systematically documented in a lab report and subsequently used to identify the substances in a scientifically grounded final report.

Competencies:

Subject-Specific Competence: Applying knowledge of material properties (solubility, pH, acid-metal reaction) to identify unknown substances.
Knowledge Acquisition: Independently sketching and labeling experimental setups, as well as implementing a qualitative analysis strategy.
Media Competence: Using digital learning elements (QR codes/audio) to approach science-related problems.
Language Competence: Writing a logically consistent detective report using specialized chemical terminology.

Target Audience and Level: Middle School

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