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Effects of Hydrocarbonate (HCO3) On Photosynthesis. In the experiment we placed 2 pieces of Eloda (pondweed) into a syringe. We then filled the syringe with water up to the brim. The nozzle of the syringe was attached to a capillary tube. The barrel of the syringe was then put back on the syringe just enough to not allow any air to get into the apparatus. The syringe was pushed down to push all of the air out of the capillary tube and then pulled back up slowly to form a meniscus. The meniscus was then marked and a lamp placed 8cm away from the apparatus to produce the light needed for the plant to photosynthesise. The meniscus was then measured every 5 minutes for 30 minutes. The process was then repeated but instead of using water in the syringe hydrocarbonate solution was used. These were 0.01, 0.0125, 0.0166, 0.025, 0.5 moles per...

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