Lab-Aids: Identification of Chemical Reactions Kit
Looking for activities that help students hone their deductive reasoning and observation interpretation skills? Then take a close look at this! Students first mix seven known solutions into any of twenty-one possible combinations, using standard lab procedures. They then observe and make notations as to how the chemicals react.
Some of the chemical reactions produced by the combinations are:‚
- Formation of a precipitate‚
- Color change‚
- Gas generation‚
- Exothermic reaction‚
After recording their observations, students must decide whether a chemical reaction has taken place, and provide evidence to support their deductions. As an extension, students can write the probable chemical equation of each reaction. Lab is complete for 50 students.
The Identification of Chemical Reactions Kit is an excellent complement to the Identification of Substances Kit LAB-83.
Scientific Concepts:
- Conduct experiments and Identify four types of chemical reactions: color changes, precipitates, gas generation, and exothermic
- Involves deductive reasoning when testing "unknowns"
Content List:
- 1 Teacher's Guide with MSDS
- 50 Student Worksheets and Guides
- 12 Chemplates‚® with spatulas
- 2 Solution 1, Hydrochloric acid, Drop control bottle
- 2 Solution No. 2, Sodium carbonate, Drop control bottle
- 2 Solution No. 3, Sodium hydroxide, Drop control bottle
- 2 Solution No. 4, Potassium chromate, Drop control bottle
- 2 Solution No. 5, Calcium chloride, Drop control bottle
- 2 Solution No. 6, Sodium hydrogen sulfite, Drop control bottle
- 2 Solution No. 7, Copper sulfate, Drop control bottle
- 2 Å“Unknown solution, Drop control bottle
Classroom Planning:
- To complete this kit requires one ~50-minute class period.
- Number of students: 50
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