relationship between pH value and rate of photosynthesis

... GROUP 4 PROJECT-CHEMISTRY PRACTICAL REPORT NAME: ZHUANG YUAN CLASS: 5.08 KINGS Background information pH influences the rate of photosynthesis. University students and scientists have conducted experiments showing how pH affects the rate of photosynthesis. The result shows that in pH 7.5 solution leaves produce oxygen the fastest and those in pH 4.5 the slowest( using pH 4.5, 5.5, 6.5 and 7.5). (Source from the internet: www.madsci.org/posts/archives/mar2000/952732207.Bt.q.html ) pH of the solution is determined by the H+ ion in the solution. In pond water, there are many ions present at well. Do they influence the rate as well? Purpose Test the relationship between the pH value of water and different ions present to the rate of photosynthesis in plants. Hypothesis The closer the pH value is to neutral(pH=7) and fewer ions present, the faster the rate of photosynthesis. Variables dependent independent controlled pH of pond water using data logger Pond water of different locations in Singapore * Amount of sampled Water * Light intensity * Resistivity of the

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