1. 22.2 – Reacting Two Elements

2. Setup Index card to hold tubes in place (taped down)
1 test tube full of air
1 test tube with air and steel wool
Steel wool has soaked in vinegar to remove a protective coating.

3. Initial Observations Steel Wool Water level in test tubes
Steel Wool & Air
Test Tube
Air
Test Tube
Fill in – First Row:
Position of Water in Test tubes
Appearance of Steel Wool

4. Running the Experiment
17 minute video of the reaction. Skim through to see what happens.
(Click here to go directly to the YouTube Video)

5. Final Observations Steel Wool Water level in test tubes
Steel Wool & Air
Test Tube
Air
Test Tube
Fill in – Second Row:
Position of Water in Test tubes
Appearance of Steel Wool

6. Even Later…
Not part of the lab or the lab worksheet – just a chance to see what happens with more time. There’s powdery red rust underneath the steel wool as well.

7. Recap: Steel Wool Appearance
Before
After
Double Check:
Appearance of Steel Wool – both rows

8. Recap: Water Level Before After Steel Wool & Air Test Tube
Note: The beaker has marks every 50 mL. These marks are approximately 0.8 cm apart.
Fill in:
How Far Has Water Moved up the Test Tube?

9. Information About Air Air is composed of ROUGHLY:
78% Nitrogen
21% Oxygen
1% Carbon Dioxide
A smidgeon of gases
Nitrogen in the air is pretty stable (doesn’t react with many things).
Oxygen in the air is more reactive.
Carbon dioxide in the air is pretty stable.