Chemical and Physical Change Lab

1. Baking Soda & Vinegar a. Take a small amount of baking soda. b. React the baking soda with 10 mL of vinegar in a beaker.

2. Starch & Iodine a. Add a small amount of soluble starch to a small beaker containing about 20 mL of water. b. Swirl the solution gently to mix it. c. Add 2 drops of tincture of iodine to the starch solution.

10. Steel wool & candle a. Place a small candle on the lab table. Light the candle with the match. b. Hold the steel wool with the tweezers over the flame. c. Take the steel wool out of the flame and let it cool.

3. Milk of Magnesia & Phenol red a. Add 1-2 drops of phenolphthalein to a test tube containing 5 mL of milk of magnesia.

4. Magnesium sulfate & Sodium carbonate a. Add 5 mL magnesium sulfate solution to one test tube. b. Add 5 mL sodium carbonate solution to a separate test tube. c. Pour the sodium carbonate solution into the magnesium sulfate solution.

5. Calcium chloride & water a. Put 5 mL water in a test tube. b. Add a few pieces of calcium chloride. Make sure to notice any temperature change.

6. HCl & Sodium bicarbonate a. Put 5 mL hydrochloric acid (HCl) in a test tube. b. Use the scoop to add some sodium bicarbonate Make sure to notice any temperature change.

7. Sucrose & sulfuric acid a. Put a small amount of sugar into a test tube. b. Add 5 ml of sulfuric acid to the sugar.

8. Glowsticks a. Take scissors and cut off one end of the glowstick. b. Place the cut end upside down in the test tube. c. Use scissors to cut off the other end of the glowstick. d. Remove the glass tube if you can. e. Place the glass tube back into the glowstick and break it to start the chemical reaction. Chemical and Physical Change Lab

9. Limewater & CO2 a. See Mrs. Constant for this reaction. Name: ______Period: ______Date: ______

Purpose: What are the differences between chemical and physical properties? What are the differences between chemical and physical changes?

Safety: Wear goggles. Take standard precautions: Don’t get chemicals in your eyes, don’t ingest any chemicals. If you get liquid chemicals on your skin, wash it off.

Procedure: Make sure to record all observations in a data table correlated to the procedure step number. Observations should include properties of the substances before and after any change, as well as what happens during any change. Note: All amounts are approximate.

Data (Observations) Table Step Properties of Starting During Change Properties After Change # Materials Chemical and Physical Change Lab

Questions

1. List 3 physical properties you observed in this lab.

2. List 3 chemical properties you observed in this lab.

3. List five pieces of evidence from this lab that indicate a chemical change occurred.

4. List three physical changes you observed.

5. Distinguish between chemical and physical properties.

6. Distinguish between chemical and physical changes. 2. Starch & Iodine 1. Baking Soda & Chemical and Physical Change Lab

Vinegar a. Add a small amount of starch to a small beaker a. Take a small amount of containing about 20 mL baking soda. of water. b. React the baking soda b. Swirl the solution gently with 10 mL of vinegar in to mix it. a beaker. c. Add 2 drops of iodine to the starch solution. 10. Steel wool & candle 3. Milk of Magnesia & Phenol Red a. Place a small candle on the table. Light the candle with the match. a. Add 1-2 drops of phenol red to a test tube b. Hold the steel wool with containing 5 mL of milk the tweezers over the of magnesia. flame.

c. Take the steel wool out of the flame and let it cool.

4. Magnesium sulfate & 5. Calcium chloride & Sodium carbonate water Chemical and Physical Change Lab

a. Add 5 mL magnesium a. Put 5 mL water in a test sulfate solution to one tube. test tube. b. Add a few pieces of b. Add 5 mL sodium calcium chloride. Make carbonate solution to a sure to notice any separate test tube. temperature change.

c. Pour the sodium carbonate solution into the magnesium sulfate solution. 6. HCl & Sodium 7. Sucrose & sulfuric Bicarbonate acid

a. Put 5 mL hydrochloric a. Put a small amount of acid (HCl) in a test tube. sugar into a test tube. b. Use the scoop to add b. Add 5 ml of sulfuric acid some sodium to the sugar. bicarbonate. Make sure to notice any temperature change.

8. Limewater & CO2 9. Glowsticks Chemical and Physical Change Lab

a. Add 10 ml of limewater a. Take scissors and cut to a test tube. off one end of the glowstick. b. Give the test tube to Mrs. Constant. b. Place the cut end upside down in the test tube.

c. Use scissors to cut off the other end of the glowstick.

d. Remove the glass tube if you can.

d. Place the glass tube back into the glowstick and break it to start the chemical reaction.