1. Carbon Changing Costumes Day 2
Take out your journal, Green packet
and carbon diagram map

2. Warm-Up 3/23 and 3/26
Thinking about yesterday’s station, there were two bottles that contain BTB and seltzer water
Yellow = cold temp
Blue = warm temp
1. Why is one blue and
the other yellow?
2. What’s going on with the CO2?
3. What would you expect to hear from each bottle
when you opened them?

3. Warm-Up Review
Thinking about yesterday’s station #1, there were two bottles that contain BTB and seltzer water:
Yellow = cold
Blue = warm
1. Why is one blue and the other yellow? Cold bottle (yellow) had more dissolved CO₂ (aq) making it more acidic, Warm bottle (blue) had less dissolved CO₂ (aq) and more CO₂ (g) making it more alkaline—there was more in a gas form.
2. What’s going on with the CO₂ ? It leave the warmer water (less solubility)
3. What would you expect to hear from each bottle when you opened them?
The cold bottle would have less gas escaping, you would hear a lot of fizz escaping the warm bottle.

4. Important Take Home Ideas for Station #1
When CO₂ is dissolved in the seltzer, it is aqueous (aq)
When CO₂ is no longer dissolved, it is a gas (g) (exsolution)
CO2 (aq) CO2 (g)
Cold gases dissolve better than warm gases
This is also happening:
H2CO3(aq) CO2(g) + H20(l)
(Carbonic Acid)

5. Station 1: Review Make sure to use complete sentences in your journal when answering the questions.
What is the chemical formula for Carbon at the start? CO₂
What Carbon is this supposed to represent in the real world? Carbon in atmosphere
What is the chemical formula for Carbon at the end? H₂CO₃ Carbonic Acid
What Carbon is this supposed to represent in the real world? Acid in the ocean
What made Carbon change forms? Temperature
Where could this simulation happen in the real world? Ocean Acidification
Write the balanced chemical equation
for this station below:

6. Carbon Cycle Poster
Identify: Atmosphere, Hydrosphere and Lithosphere on the front of your map Adding to our list on the back of your map:
Key Molecules
Key Processes
Other Key Ideas
C₆H₁₂O₆ (s) Glucose
Weathering
CaCO₃ Calcium Carbonate
Acid Rain
CH₃COOH Acetic acid

7. Station 2: Carbon Percolation (Soil Leaching)
We’ve examined part of the Carbon Cycle in the ocean- how about on land?
Follow the directions to explore how solid Carbon is incorporated into soil!

8. What would happen if all Carbon stayed solid and didn’t percolate into soil?
Brainstorm…

9. Station 2 Carbon in the soil…
Soils are a significant source of carbon. In the soil there is a variety of carbon forms, however most matter is degrading (decomposition). This decay makes carbon more accessible through the process of soil leaching. Some carbon goes back into the atmosphere, some are nutrients, some gets mineralized.

10. Add Percolation to Map…

11. Station 3: Acid weathering of rock
CaCO₃ (calcium carbonate)
CH₃COOH (acetic acid)
H₂CO₃ (carbonic acid)
Chemical weathering- breakdown of rock, by acid, into different molecules (happens in land and in ocean)
Acid rain- rain containing acid components

12. Station 3 Acid Weathering of Rock
Carbon dioxide is released into the atmosphere. Mixed into rain as weak carbonic acid. The acid then breaks down the rocks into minerals and ions which then get washed into rivers, lakes and oceans

13. Add Weathering to map:

14. Complete Lab stations #2 and #3
Work on green packet questions in your journal
Make sure everything is defined on back of map.

15. Due Next Time Green packet…complete questions for Station 2 and 3
ON the front of your map, draw out these two processes (showing where they take place along with the chemical formulas for the form of carbon):
Percolation (Soil Leaching)
Chemical Weathering