№ files_lp_4_process_3_103468
Chemistry laboratory worksheet presenting a school experiment and questions examining observations from heating chocolate and egg white to distinguish chemical and physical changes.
Subject: Chemistry
Topic: Chemical and physical changes
Type of document: Laboratory experiment worksheet
Educational level: School science education
Activity type: Practical laboratory investigation
Equipment: Bunsen burner, test tubes, beaker, tripod, gauze, heat resistant mat, test tube rack, test tube holder, safety glasses
Chemicals: Chocolate, egg albumen (egg white)
Learning objectives: Safely heat substances, record observations, distinguish chemical and physical changes
Safety requirements: Eye protection, safe handling of hot apparatus, no tasting of laboratory materials
Experimental method: Heating chocolate and egg white in a water bath using a Bunsen burner and observing changes during heating and cooling
Observation recording: Table of observations before heating, immediately after heating, and after cooling
Assessment tasks: Classification of chemical and physical changes, interpretation of observations, identification of reactants and products in a chemical equation
Related concepts: Reversible and irreversible changes, change of state, colour change, heat release, formation of new substances
Price: 8 / 10 USD
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