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Bring a dynamic example of Le Châtelier’s principle to your classroom with this teacher-led, student-engaged demonstration kit. Students observe a shift in the solubility of carbon dioxide in seltzer water in action as pressure is applied to the system. A pH indicator gives visual clues to the equilibrium change. This demonstration requires approximately 10 min, and materials are sufficient for 5 demonstrations.
Students are active participants in this demonstration of Le Châtelier’s principle and equilibrium. After making predictions about what will happen, they observe a color change indicating an equilibrium shift in the solubility of carbon dioxide in seltzer water. Students explain on a particulate level why a change in pressure resulted in the pH change and answer Big Picture Questions that solidify the underlying science concepts. This demonstration requires approximately 10 min, and materials are sufficient for 5 demonstrations.
|Syringe, 60 cc||1||Included|
|Luer Lock (for syringe)||3||Included|
|Methyl Red, 0.20%, 15 mL||1||Included|
|Digital Resource Card||1||Included|
|Teacher’s Manual with Reproducible Student Sheet||1||Included|
|Graduated Cylinder, 100 mL||1||Needed, Not Included|
|Beaker, 100 mL||1||Needed, Not Included|
|Test Tubes, Standard||2||Needed, Not Included|
|Seltzer Water, 1 L||1||Needed, Not Included|
|White Paper, 8-1/2 x 11”||1||Needed, Not Included|
|Paper Towels||Needed, Not Included|
|Pliers||Needed, Not Included|