TWO 3D MOLECULAR DESIGNS WATER KITS (1 NEW AND 1 USED) Each new cup kit cost $62.00 on the 3D Molecular Designs and Amazon websites. Includes instructions and one CD. Polarity is unforgettable after modeling with these engaging magnetic molecules. Students love figuring out molecular attractions and repulsions, providing a springboard to more complex chemistry concepts. When using this kit, students can investigate the polarity of water molecules. Explore ionic, covalent, and hydrogen bonds. Experiment with adhesion, cohesion, and capillary action. Identify and model states of matter. Demonstrate changes in volume between liquid and solid water. Build different types of ice. Simulate solubility with sodium and chloride ions. Build ethane and ethanol to observe interactions with water. Considered the gateway kit for students to develop model literacy, this is a great beginning of the year activity. Rigorous and engaging materials that provoke, inspire, and invite all students to learn. Water Kit© Contents Per Kit or Cup24 Oxygen* Pieces (Used to Assemble 12 Water Molecule Models)24 Hydrogen* Pieces (Used to Assemble 12 Water Molecule Models)1 Chloride* (Chlorine) Model1 Sodium* Model2 Carbon Pieces (Used to Assemble 1 Ethane Model)6 Hydrogen** Pieces without Magnets (Used to Assemble 1 Ethane Model)1 Post (Used to Assemble 1 Ethane Model)1 Hydroxyl* Group Model (Preassembled)*North and south poles on embedded magnets simulate the partially positive and negative charges of oxygen and hydrogen atoms, and chloride and sodium ions.**The hydrogen pieces for the ethane model do not include embedded magnets, since ethane is nonpolar. Each new water kit costs $62 on the 3D Molecular Designs website. Please pay at the conclusion of the auction. The water kits will be shipped within three days of receiving payment. Serious bidders only. No refunds.