For the CO2 impact experiment station: 1) Obtain two plastic cups, red cabbage indicator, a straw, and plastic wrap. 2) Fill each cup approximately one-quarter to one-third full of tap water and add ~10 mL of the red cabbage indicator. 3) Place the two cups side by side on a sheet of white paper. 4) Place the straw into one of the beakers and cover that beaker with the plastic wrap. 5) Carefully blow bubbles into the test cup for 3 min. and observe both cups. 6) Compare the color to the control cup and record any differences. This the Question: Did the beaker with the solution into which CO2 was bubbled change pH/color? By how much? Is this what, you would predict, based on your knowledge of the chemistry of CO2?
For the CO2 impact experiment station:
1) Obtain two plastic cups, red cabbage indicator, a straw, and plastic wrap.
2) Fill each cup approximately one-quarter to one-third full of tap water and add ~10 mL of the red cabbage indicator.
3) Place the two cups side by side on a sheet of white paper.
4) Place the straw into one of the beakers and cover that beaker with the plastic wrap.
5) Carefully blow bubbles into the test cup for 3 min. and observe both cups.
6) Compare the color to the control cup and record any differences.
This the Question: Did the beaker with the solution into which CO2 was bubbled change pH/color? By how much? Is this what, you would predict, based on your knowledge of the chemistry of CO2?
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