1. Chemical Reactions Lab

2. Penny Reaction Materials 100 ml beaker 4 pennies White vinegar Salt
Paper towels
Bolts
Glass rod

3. Directions Put in 50 ml of vinegar in the beaker
Add ½ spoon of salt and stir with the glass rod
Stir with the glass rod until all the salt dissolves
Add 2 pennies to the mixture and leave for 1 minute
Take out the pennies, rinse them, and put them on the paper towels
Add 2 more pennies to the mixture and leave for 1 minute
Take out the pennies, do not rinse them, and put them on the paper towels

4. Directions (continued)
Place two bolts in the mixture and leave them for 1 minute
Take out the two bolts and place them on the paper towel.

5. Questions
Describe what happened to the first two pennies you placed in the mixture?
Describe what happened to the second two pennies you placed in the mixture?
Describe what happened to the bolts you placed in the mixture?
What tells you that a chemical change occurred?

6. Clean Up Leave the pennies and bolts on the paper towel.
Pour the salt and vinegar mixture down the sink and rinse it down with water.
Rinse out the beaker completely.
Return the salt to the front table.

7. Lights Out Material 100 ml beaker Baking soda Vinegar
A lit candle in clay

8. Directions The teacher will come around and light your candle.
Add 10 ml of vinegar to the 100 ml beaker.
Put 1 spoon of baking soda in the 100 ml beaker.
After the baking soda and vinegar stop reacting, pour the contents of the beaker on the candle but do not the liquid.

9. Questions
Describe what happened when you poured the beaker onto the candle? Why?
What tells you that this was a chemical reaction?

10. Clean Up
Pour the baking soda and vinegar mixture into the sink and rinse it down with water.
Rinse the beaker out thoroughly.
Return the baking soda, vinegar, candle, and beaker to the front desk.

11. Blobs in a Bottle Materials 100 ml beaker Vegetable oil
Alka-Seltzer tablet
Food coloring
Glass rod
Brush

12. Directions Add 30 ml of water to the beaker
Add 50 ml of vegetable oil to the beaker.
Let the beaker rest for 1 minute
Add two drops of food coloring to the beaker
Drop in ¼ of the Alka-Seltzer tablet
Wait for 30 seconds and drop in another tablet and repeat

13. Questions Why do the water and vegetable oil separate?
Describe what happened when you dropped in the food coloring? Why?
Does the Alka-Seltzer tablet react with the oil or water? How do you know?
What tells you that a chemical change occurred?

14. Clean Up
Pour the water and oil mixture down the sink and rinse it down with water.
Use the brush and cleaning powder to clean the beaker.
Return the food coloring, bolts, pennies, and vegetable oil to the front table.
Wipe your area well.
Return your goggles to the back counter.