Meets AP Science Practices 1, 2, 4, 5, 6, and 7
- Addresses Big Idea 1, 2, & 3
- Materials provided for 30 students working in pairs
- Investigation includes updated literature aligned with new AP Chemistry curriculum standards
The central challenge in this kit is determining the hardness of a water sample. Students will be tasked with designing a procedure in the guided inquiry section to determine the hardness of water. Students are tasked with determining which of six water samples, representing different areas in their community, require a water softening system. Gravimetric Analysis is the central technique used to analyze the sample. Includes Calcium chloride and sodium carbonate. Requires a 250 mL Buchner funnel, No. 6 Buchner funnel rubber stopper, aspirator or vacuum pump, rubber tubing, analytical balance, drying oven, and ring stand/clamps, available separately.
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Ordering information: Kit contents include Calcium Chloride Anhydrous, Sodium Carbonate Anhydrous, Sodium Carbonate, and Calcium Chloride. Materials required but not provided are DI Water, Beakers, Graduated Cylinders, Watch Glasses, Erlenmeyer Flasks, Rubber Stoppers, Buchner Funnels, Side-Arm Flasks, Vacuum pump or aspirator, Filter paper, Funnel, 3 inch glass tubing (optional), Ring Stands, Clamps, Analytical Balances, Drying Oven (optional), Rubber Tubing, Pipettes, Stir Rods, Lab Notebook, Gloves, Safety Goggles, and Lab Aprons.
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