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An Experiment To Investigate The Amount Of O Given Off By Elodea With Varying Concentrations Of NaHCO

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An Experiment To Investigate The Amount Of O Given Off By Elodea With Varying Concentrations Of NaHCO Aim- To investigate the amount of O given off by the Elodea with varying amounts of concentrations of NaHCO . The rate of photosynthesis is measured by counting the number of bubbles of O being produced during that process. Introduction- Photosynthesis is the process in which plants take in energy from the sunlight. It is then converted into food energy. It is responsible for all carbon compounds in living organisms. When a plant cell absorbs the suns light, H O and CO it gives out oxygen and glucose. Graphs to show photosynthesis- This graph shows that the light intensity speeds up photosynthesis, but only to a certain point, and beyond that the increase of light intensity has a small effect. ...read more.


The CO varies due to the changes in the NaHCO solution concentrations. Variables, Affecting Photosynthesis: - CO - H O - Chlorophyll - Light - Temperature Prediction- The greater the sodium hydrogen carbonate solution concentration, the greater the rate of photosynthesis. The sodium hydrogen carbonate solution concentrations doubles so also the rate of photosynthesis will. When there is less concentration of carbon solution then the bubbles will be quicker and there will be more of them. So photosynthesis is quicker and more oxygen is produced. Equipment: - Pond weed (Elodea) - Beaker - Sodium hydrogen carbonate solution (NaHCO ) various amounts- 0.000M, 0.025M, 0.050M, 0.100M, 0.200M, 0.400M. - Light (lamp) ...read more.


My results get faster as there was more sodium hydrogen carbonate used. A few of my results don't follow the others, so they don't support my prediction because they are not as close to the line of best fit; this might be because the concentration of sodium hydrogen carbonate was measured wrong. Improvements/sources of errors- The graph curves to the left like it supposed to because the higher the concentration the more amount of bubbles dispersed. The few odd results which aren't near the line of best fit are wrong due to human error either using the wrong amount of concentration or the bubbles might have been counted wrong or the elodea was damaged so didn't produce the right amount of oxygen. John George 4PJG ...read more.

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