LAB #6 Photosynthesis and Cellular Respiration

7. Place a 6 cm Elodea stem with leaves in vials #1, 2, 4 and 5. Vial #4 will not have any Elodea. 8. Fill vials #1, 2, 3 and 5 with this CO 2 enriched solution containing bromothymol blue. 9. Fill vial # 4 with tap water and add one dropper full of bromothymol blue. 10. Wrap a piece of aluminum foil around vials #2 and #4. 11. ................
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