Research question: How does the concentration of sodium bicarbonate relate to the amount of oxygen produced by Elodea (Canadian pond weed) in the process of photosynthesis?
Hypothesis: If there is an increase in concentration of sodium bicarbonate the amount of oxygen produced will increase because the sodium bicarbonate concentration will increase the carbon dioxide levels.
Independent variable- Concentrations of sodium bicarbonate (8%,6%,4%,2% 0%)
Dependent variable- Amount of oxygen collected in the measuring cylinder.
Controlled variables- 6cm Elodea, Run for the same time (48 hours), same equipment for each group, same light (continuous) and temperature (room temperature).
Equipment- Small funnels, 500ml beakers, 25ml measuring cylinder, sodium bicarbonate, Elodea pondweed, scissors and ruler.
Background- Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the Sun, into chemical energy that can be later released to fuel the organisms' activities. Photosynthesis is the chemical reaction that takes place in plants. Photosynthesis is also an enzyme controlled reaction. The chemical formula for the process of photosynthesis is:
6CO2 + 12H2O C6H12O6 + 6O2
The process of photosynthesis uses sodium dioxide and water to form glucose and oxygen. This experiment will measure the effect of the concentration of sodium bicarbonate with the pondweed and the rate of photosynthesis. The increased concentration of carbon and oxygen atoms in the sodium bicarbonate will result in the increase of the rate of photosynthesis of the pondweed. This is due to the fact that plants require carbon dioxide and water to produce glucose and more importantly for this experiment, oxygen.
Observations- Over the course of 48 hours, the pondweed has produced enough oxygen to displace the water. The process of photosynthesis has produced enough