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Chemical and Physical Changes

Chemical and Physical Changes. Take notes on the following video http://www.youtube.com/watch?v=X328AWaJXvI Complete the following lab. Observations: Quantitative , Qualitative, Physical Change, and Chemical Change. Part 1 Add 100 mL of water to a 250-mL beaker.

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Chemical and Physical Changes

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  1. Chemical and Physical Changes Take notes on the following video http://www.youtube.com/watch?v=X328AWaJXvI Complete the following lab.

  2. Observations: Quantitative, Qualitative, Physical Change, and Chemical Change

  3. Part 1 • Add 100 mL of water to a 250-mL beaker. • Add three drops of food coloring to the beaker of water. • Record observations.

  4. Part 2 • Using a spot plate, fill ¼ of a well with ammonia. • Add 1 drop of phenolphthalein. • Make observations. • Add vinegar to the top of the well. • Record observations.

  5. Part 3 • 1. Using a lab scoop, place one scoop of Copper II Sulfate also named Cupric Sulfate in a mortar. • 2. Use a pestle to grind the Copper II Sulfate into a uniform powder. • 3. Place the powder in a crucible. • 4. Set up a ring stand with Bunsen burner as shown. • 5. Heat gently with the Bunsen burner for four minutes or until the Copper II Sulfate turns white. • 6. Pick up crucible with tongs and place on a square tile to cool for five minutes. (You can work on a different part of this lab while it cools. • 7. Use a wash bottle, to add some water to the crucible. Lab Scoop

  6. Part 4 • DO THIS EXPERIMENT IN THE FUME HOOD. • 1. Note the appearance of magnesium ribbon. • 2. Place a watch glass in the fume hood. • 3. Light the Bunsen burner in the fume hood. Using tongs, hold the magnesium ribbon in the hottest part of the flame. DO NOT LOOK DIRECTLY AT THE BURNING MAGNESIUM. • 4. Let the burnt magnesium ribbon fall onto a watch glass. • 5. Record observations.

  7. Part 5 • Fill a 250 mL beaker with water. • Place ½ a table of Alka-Seltzer in the water. • Make and record observations

  8. Part 6 • Add one level teaspoon of corn starch in a 250 mL beaker. • Add 2 mL of water and stir. • Keep stirring. • Pour the solution into your hand. • Record observations.

  9. Part 7 • Burn paper. • Record observations.

  10. Part 8 • Light a candle. • Observe it for 3 minutes. • Record observations.

  11. Part 9 • Obtain a small piece of steel wool. • Light the Bunsen burner. • Using tongs, place the steel wool in the hottest part of the flame. • Record observations. Video

  12. Part 10 • Heating wax

  13. Part 11 • Burn nylon Video

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