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This Mass Changes in Chemical Reactions—Microscale Chemistry activity also includes:
- Apparatus and Techniques for Microscale Chemistry
- Lab & Experiment
- Worksheet
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What better way is there to introduce conservation of mass than a few simple experiments? Young chemists conduct two chemical reactions, take the masses of reactants and products, then compare their results to determine differences in mass.
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CCSS:
Adaptable
NGSS:
Adaptable
Concepts
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Instructional Ideas
- Have partners perform the experiment as an inquiry, then use their data as evidence for an explanation of conservation of mass
- Lead the class in writing and balancing the chemical equations for the reactions to show the connection between molar coefficients and conservation of mass
Classroom Considerations
- Make sure pupils zero out their balances before taking mass measurements for optimum accuracy
- The activity calls for three-well spot plates, which can be made by cutting down standard well plates
Pros
- Microscale labs save time and materials
- The teacher's guide contains references materials and student copies of the experiment and worksheet
Cons
- None