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Pre LAB

Pre LAB. Properties of Water & Water Chemistry. Water’s Properties. Cohesion Adhesion Capillarity High Specific Heat High Heat of Vaporization Solid water (ice) is less dense than liquid Solvent Transparent. Station #1: Freeze!. Can of Soda room temperature Can of Soda frozen.

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Pre LAB

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  1. Pre LAB Properties of Water & Water Chemistry

  2. Water’s Properties • Cohesion • Adhesion • Capillarity • High Specific Heat • High Heat of Vaporization • Solid water (ice) is less dense than liquid • Solvent • Transparent

  3. Station #1: Freeze! • Can of Soda room temperature • Can of Soda frozen

  4. Station #2: Dish-and-clips • Place paperclip gently on the water. • state of being stretched tight like an elastic sheet, due to the unequal attraction of the particles in the surface layer to the environment and to the bulk of the liquid.

  5. Station #3 Stir It Up • Pour water from beaker along stirring rod

  6. Station #4: Sink or Swin • Ice cube ( d=0.917 g/mL) • Water • Ethanol (d= 0.789 g/mL)

  7. Station #5 = Stop on a Dime • How many drops of water will “fit” on dime before it spills over edge. • ADD: Alcohol COMPARE

  8. Station #6: Much Color-ado about Nothing • Observation of test tubes • Food coloring in water • Food coloring in oil

  9. Station #7: To Wax Philosophic • Wax paper • Water and dropper • Drag tip of dropper around wax paper

  10. Station #8: A Watched beaker Never boils • Beaker with boiling water and no watch glass • Beaker with boiling water and watch glass

  11. Station #9: Down to the Wire • Lay ice of wire over ice cube • Grasp wire push wire down on ice cube

  12. Station #10: Super Solvent • Water / Alcohol / Oil • Sugar • Salt • butter

  13. Station #11: Anti Gravity • Paper towel in water

  14. Station #12: Along the Wall • Graduated Cylinder • Water. Oil, alcohol

  15. Station #13: To Be or Not to Be..Chemistry of living things. Change pounds to kg (2.2l lbs = 1 kg. • Elements and compounds that make up living things. • 96% of body mass is madeof,___,___,__AND ___. • 4% is phosphorus, sulfur, sodium chloride, magnesium, potassium iron, and iodine. Mass of base elements for a 70 kg (154 lb) person. oxygen 43 kg (61%) Carbon 16 kg (23%) hydrogen 7 kg (10 %) nitrogen 1.8 kg (2.5%) calcium 1.0 kg (1.4%) phosphorus 780 g (1.1%) potassium 140 g (0.20%) sulfur 140 g (0.20%) sodium 100 g (0.14%) chlorine 95 g (0.14%) Magnesium 19 g (0.03%, 0.78 mol)

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