resultsandconclusion for pH effect on photosynthesis formal report

# Resultsandconclusion for pH effect on photosynthesis formal report

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After the first week of testing, our group tested our hypothesis of the effects of age on photosynthetic rate on a bean plant. We used the exact same steps as the previous week’s test on a regular plant, and recorded our results. Our group obtained a bean plant that was approximately two weeks of age, and a bean plant that was approximately three weeks of age from our lab assistant. As a reminder, my hypothesis for the effects of age on the photosynthetic rate was that the younger, two week old plant would have a faster photosynthetic rate than that of the older, three week old plant. Below is the graph that was obtained during the experiment. After three tests were performed on both plants, this graph was obtained, and the following numbers correspond with each plant and phase: 1- initial phase of 2-week-old plant 2- middle phase of 2-week-old plant 3- final phase of 2-week-old plant 4- initial phase of 3-week-old plant 5- middle phase of 3-week-old plant 6- final phase of 3-week-old plant The x-axis represents time in minutes, and the y-axis represents the percentage of oxygen inside the chamber.

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As I mentioned in the previous few pages, one can use all the data obtained in the experiment and use the next two formulas to find the photosynthetic rate of the plant: (1) y = 10,000 x / [((273 + T)/(273))(22.413)] ųmoles of O 2 /L/min x = % oxygen / min T= temperature of the classroom (2) Photosynthetic rate = (0.047)(y ųmole of O 2 /min/leaf) (3) divide # 2 by the surface area of leaf (m 2 ) to get the photosynthetic rate in ųmol of O 2 /L/min Using the previous formulas, I will be able to now walk through the calculations for finding the photosynthetic rate of each plant. 2 week old bean plant x = % oxygen / min, T= 23K, Surface Area= 35.65cm 2 (.003565m 2 ) Initial phase: x = .1943 y = 10,000(.1943) / [((273 + 23)/(273))(22.413)] ųmoles of O 2 /L/min y = 79.95 ųmoles of O 2 /L/min Photosynthetic rate = (0.047)(79.95 ųmole of O 2 /min/leaf) / 0.003565m 2 Photosynthetic rate = 1054.0495 ųmole of O 2 /min/leaf Middle phase: x = .3310 y = 10,000(.3310) / [((273 + 23)/(273))(22.413)] ųmoles of O 2 /L/min y = 136.21 ųmoles of O 2 /L/min Photosynthetic rate = (0.047)(136.21 ųmole of O 2 /min/leaf) / 0.003565m 2 Photosynthetic rate = 1795.7560 ųmole of O 2 /min/leaf Final phase:
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Resultsandconclusion for pH effect on photosynthesis formal report

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