Part 1a: Identifying Chemical and Physical Properties

Materials:

200 mL beakerphenolphthalein solution (1% acidified)

Small piece of an antacid tabletferric ammonium sulfate solution

Sodium carbonate solutiongraduated cylindertap water

Procedure:

  1. Pour about 50 mL of tap water into a beaker.
  2. Add several drops of phenolthalein to the beaker and record your observations in the data table below. (Phenolpthalein is an acid/base indicator.)
  3. Drop the piece of antacid tablet into the beaker and record your observations in the data table. There should be more than one observations…use all of your senses but taste!
  4. Add 20 mL of ferric ammonium sulfate solution to the beaker and record your observations.
  5. Add 20 mL of sodium carbonate solution to the beaker. Observe the bottom of the beaker closely and record your observations in the data table.
  6. Dispose of your solution down the drain with plenty of water. Rinse your beaker and graduated cylinder well with water, put them back in your drawer, and clean up your lab counter.

Data:

Part 1b: Identifying Chemical and Physical Properties

Materials:

Hydrogen peroxide

Slice of raw potato

100 ml beaker or clear plastic cup

Procedure:

  1. Take a slice of potato and place it on a paper towel
  2. Put 10 drops of hydrogen peroxide on the potatoe.

Observations:

  1. What happened when the hydrogen peroxidewas first added tothe potato?
  2. Was there any color changes to the potato?

Analysis:

Explain what you think took place – account for each observation.

Conclusion:

Describe the physical and chemical properties of the hydrogen peroxide and the potato.

Part 1c: Identifying Chemical and Physical Properties

Materials:

Iron filings

Sugar

Magnet

Glass plate (or overhead transparency)

Procedure:

  1. Combine ½ of a spoonful of iron filings with a spoonful of sugar on anoverhead transparency.
  2. Use the magnet to separate the iron filings from the sugar (use the magnet underneath the overhead transparency).
  3. Record your observations.
  4. Place the iron filings back in the container and the sugar back into the container.

Observations:

  1. What happened when the magnet was moved around under the glass plate?
  1. Could you make a design on the plate?

Analysis:

Explain what you think took place – account for each observation. Is there any object (a toy perhaps) that you know of that resembles this experiment?

Conclusion:

Describe the chemical and physical properties of the iron filings and sugar.

Part 1d: Identifying Chemical and Physical Properties

Materials:

1. 2.5 g ammonium nitrate

2. 10 ml of water

3. Graduated cylinder

4. Ziploc® bag (small)

Procedure:

1. Weigh 2.5 g of ammonium nitrate and place into a Ziploc® bag.

2. Measure 10 ml of water into a graduated cylinder.

3. Pour the water into the Ziploc® bag and seal the bag removing as much air as possible.

4. Gently squeeze the bag to mix the water and ammonium nitrate.

5. Record your observations.

Observations:

What happened?

Analysis:

  1. Explain the results of your experiment. Was this a physical or a chemical change?
  2. Describe the physical and chemical properties of ammonium nitrate and water.

Part 1e: Identifying Chemical and Physical Properties

Materials:

Beaker

100ml of H2O

20g of NaCl

Procedure:

  1. Bring the water to a boil.
  2. Pour the NaCl in the water.
  3. Record what happened.

Observations:

  1. What Happened?

Analysis:

  1. Explain the results of your experiment.
  2. Describe the chemical and physical properties of salt and water.

Part 1f: Identifying Chemical and Physical Properties

Materials:

Beaker

20 ml of Acetic Acid (vinegar)

5 g of Sodium Bicarbonate (baking soda)

Procedures:

  1. Pour 20 ml of acetic acid into the beaker.
  2. Add 5 g of sodium bicarbonate into the beaker.
  3. Record what happens.

Analysis:

  1. Describe what happened.
  2. Describe the chemical and physical properties of acetic acid and sodium bicarbonate.

Part 1g: Identifying Chemical and Physical Properties

Materials:

Test Tube

Stopper

10 ml of Red Liquid

Dropper

Bleach

Procedures:

  1. Pour 10 ml of red liquid into the beaker.
  2. Add 10 drops of bleach into the test tube.
  3. Put the stopper on the test tube and shake the test tube.
  4. Record what happens.

Analysis:

  1. Describe what happened.
  2. Describe the chemical and physical properties of red liquid and bleach.

Part 1h: Identifying Chemical and Physical Properties

Materials:

Test TubeRing Stand

Sugar cubeBunsen Burner

100 ml water

Test tube holder

Hammer

Beaker

Procedures:

  1. Hit the sugar cube with the hammer and record what happens.
  2. Add 100 ml of water to the beaker and add the sugar to the water.
  3. Stir the water sugar mixture until the sugar disappears.
  4. Take 10 ml the sugar/water mixture and pour it into the test tube.
  5. Heat the test tube until the water disappears.
  6. Record what happens.

Analysis:

  1. Describe what happened.
  2. Describe the chemical and physical properties of the sugar and the water.

Part 1i: Identifying Chemical and Physical Properties

This will be done as a demonstration.

Analysis:

  1. Describe what happened.
  2. Describe the chemical and physical properties of Hydrogen and Oxygen gas and of the compound water.

Part 1j: Identifying Chemical and Physical Properties

This will be done as a demonstration.

Analysis:

  1. Describe what happened.
  2. Describe the chemical and physical properties of sodium.

Part 2: Evidence of a Chemical Reaction

Problem: How can you tell that a chemical reaction has occurred?

Hypothesis: ______

______

Materials:

Balance

6 small paper cups

Graduated cylinder

6 baggies

Water

Phenolphthalein

Calcium Chloride (CaCl2)

Baking Soda

Procedures:

  1. Get six baggies and label bags #1-#6 on the outside of the bag.
  2. Fill the following bags with the appropriate solid. Caution: CaCl2 is an eye irritant. Keep hands away from face and eyes. It Burns like Crazy!

Bag / Solids
#1 / 2.5g of CaCl2 and 2g of NaHCO3
#2 / 2.5g of CaCl2
#3 / 2.5g of CaCl2
#4 / 2g of NaHCO3
#5 / 2g of NaHCO3
#6 / 2.5g of CaCl2 and 2g of NaHCO3
  1. Get six cups and label each cup #1-#6 on the outside of the cup.
  1. Fill the cups with the appropriate liquid

Cup / Liquid
#1 / 2.5 ml Phenolphthalein and 5 ml Water
#2 / 2.5 ml Phenolphthalein
#3 / 5ml Water
#4 / 2.5 ml Phenolphthalein
#5 / 5 ml Water
#6 / 7.5 ml Water
  1. Place the number cup with the correct bag. Place the cup upright in the bag and seal the bag (Watch the demonstration of the set up). After sealing the bag, gently tip the cup over and watch what happens. Record your observations in the table. Be very descriptive.

Bag / Observation
#1
#2
#3
#4
#5
#6
  1. Throw the bags and cups away. Make sure to let any gas that is trapped in a bag out of the bag. Wipe off any spilled materials.

Analysis and Conclusion

  1. What observations indicated a chemical reaction took place during the lab?
  1. Which substance(s) was (were) responsible for the production of a gas?
  1. What reactant caused the color change?
  2. Which reactant caused the temperature to increase?
  1. Why was there no reaction between the calcium chloride and the baking soda (sodium carbonate) when they were first put into the bags together?
  1. What kind of temperature change occurred in bags #4 and #5?
  1. Define exothermic and endothermic.
  1. Which bags were exothermic?
  1. Which bags were endothermic?