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.
Add three drops of food coloring to the beaker of water.
Record observations.
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.
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
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.
Part 5
Fill a 250 mL beaker with water.
Place ½ a table of Alka-Seltzer in the water.
Make and record observations
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.
Part 7
Burn paper.
Record observations.
Part 8
Light a candle.
Observe it for 3 minutes.
Record observations.
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
Part 10
Heating wax
Part 11
Burn nylon
Video