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Lab Report: Physical and Chemical Changes

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Lab Report: Physical and Chemical Changes

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Purpose:

To investigate the difference between physical and chemical changes in matter.

Materials:

Safety glasses

13 small test tubes

Test tube rack

Test tube holder

2 100-mL beakers

Funnel

Watch glass

Stirring rod

Evaporating dish

Magnet

Magnifying glass

Crucible tongs

Spatula

Balance

Meeker burner

Ring stand

Iron ring

Wire gauze

Forceps

Sulfur

Iron filings

Sodium Bicarbonate

Sodium Chloride

Sugar

Sand

Magnesium ribbon

Hydrochloric Acid

Distilled water

Filter paper

9 disposable dishes

Procedure:

1. Label 7 of the dishes with the names of the following products: Sulfur, Iron, Sodium Bicarbonate, Sodium Chloride, Sugar, Sand, and Magnesium. Place small samples of each in the appropriate dishes.

2. Examine each sample with a magnifying glass and magnet and record your observations in the data table.

3. Put small samples of each substance in a test tube along with 3 mL of water to determine their solubility.

4. Mix some of the Iron and Sulfur on a clean disposable dish and examine the mixture with a magnifying glass and magnet. Record your observations in the data table. Save and label this mixture.

5. Mix some of the sand and Sodium Chloride on a clean disposable dish and examine the mixture with a magnifying glass and magnet. Then, place this mixture in a clean 100-mL beaker. Add 30 mL of tap water and stir. Prepare a filtration setup, filter, and record your observations.

6. Pour 10 mL of the filtrate into an evaporating dish, prepare a heating setup, and gently heat until all of the liquid is gone. Examine the residue in the evaporating dish and on the filter paper.

7. Using the crucible tongs, hold a dry piece of Magnesium ribbon in the flame. Quickly place the burning ribbon on the watch glass. Compare the appearance of the ribbon before and after burning.

8. Place the burnt remnants of the Magnesium into a clean test tube, and add 10...