-rate of photosyhthesis in presence of light intensity & CO2.
~A : sodium bicarbonate in darkness
pH b4 xperiment-9
" @ 20 min- 8
" 60 min- 8
~B: sodium bicarbonate in room light
pH b4 xperiment-9
" @ 20 min-9
" 60 min-8
~C: sodium bicarbonate 20 cm from light source
pH b4 xperiment-9
" @ 20 min-9
" 60 min-8
~D: without sodium bicarbonate 20 cm from light source
pH b4 xperiment-7
" @ 20 min-6
" 60 min-6
does my result confirm or contradict from the theory?? why?
*from what i search @ internet its seem our result is contradict....its suppose the ph leve increase right?
To determine whether the results confirm or contradict the theory, let's first understand the relationship between light intensity, CO2, and the rate of photosynthesis.
Photosynthesis is the process by which plants use light energy, CO2, and water to produce glucose and oxygen. Light intensity and the availability of CO2 are two crucial factors that influence the rate of photosynthesis.
In general, an increase in light intensity will lead to an increased rate of photosynthesis until it reaches a certain point called the light saturation point. Beyond this point, increasing the light intensity further will not have a significant effect on the rate of photosynthesis.
CO2 concentration also affects the rate of photosynthesis. An increase in CO2 concentration typically leads to an increased rate of photosynthesis as long as other factors such as light and temperature are not limiting.
Now, let's analyze the results you provided:
Experiment A: Sodium bicarbonate in darkness
- pH before the experiment: 9
- pH at 20 min: 8
- pH at 60 min: 8
Experiment B: Sodium bicarbonate in room light
- pH before the experiment: 9
- pH at 20 min: 9
- pH at 60 min: 8
Experiment C: Sodium bicarbonate 20 cm from the light source
- pH before the experiment: 9
- pH at 20 min: 9
- pH at 60 min: 8
Experiment D: Without sodium bicarbonate 20 cm from the light source
- pH before the experiment: 7
- pH at 20 min: 6
- pH at 60 min: 6
Based on the results, we can observe that the pH levels decreased or remained the same in all the experiments, except in experiment B, where the pH level remained constant. This means that the rate of photosynthesis decreased or remained the same over time.
According to the information you found on the internet, an increase in the pH level is expected as photosynthesis produces oxygen and removes CO2 from the system. However, the results you obtained contradict this expectation.
Possible reasons for the contradictory results could be experimental error, limitations in the experimental setup, or other factors affecting the rate of photosynthesis that were not accounted for.
To conclude, based on the results you provided, they contradict the theory that an increase in the rate of photosynthesis leads to an increase in pH levels. Further investigation and analysis are needed to determine the exact reasons behind these contradictory results.