This Mass Changes in Chemical Reactions—Microscale Chemistry worksheet also includes:
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.
- 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
- 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
- Microscale labs save time and materials
- The teacher's guide contains references materials and student copies of the experiment and worksheet