Title: Factors Affecting The Rate Of Photosynthesis
Headings: 
Factors Affecting The Rate Of Photosynthesis
A Level Biology Project
Aims
Introduction
Background Information
Apparatus Needed For The Experiments
Method
Light Intensity = 1 / Distance² (m)
Rate Of the Reaction = 1 / Time (s)
Predictions
Light
NaHCO3
Results
Rate Of the Reaction = 1 / Time (s) x 1000
Interpretation
Distilled Water
0.01M NaHCO3
0.02M NaHCO3
0.05M NaHCO3
0.07M NaHCO3
0.1M NaHCO3
Limitations
Extension Work
Disclaimer
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Content: Eventually increasing  the NaHCO3 concentration more will have no effect as other limiting  factors will be limiting the rate of photosynthesis. Carbon dioxide is  needed for the photosynthesis reaction. It is used to make the organic  products of photosynthesis. If the elodea is able to absorb more CO2  then the rate of photosynthesis will increase as the plant is able to  make more of the organic compounds. The plant is given CO2 in the form  of NaHCO3. Results
Pooled results from the group were used. They were taken over a 2 day  period. Molarity of NaHCO3
Light Intensity 1/d² (m)
0.00
(Distilled water)
0.01
0.02
0.05
0.07
0.1
400
3571
1666
1099
523
200
243
278
1670
5183
988
600
375
262
204
4998
4485
1175
1005
473
351
156
5590
2300
1770
1445
621
550
100
9990
3150
2900
2552
1224
645
25

4762
3984
2850
1640
1408
11

5945
4348
3780
2830
2564
4

16480
11904
5196
6578
3226
Using these results I worked out the rate
Rate Of the Reaction = 1 / Time (s) x 1000
The rate was multiplied by 1000 to make the numbers easier to handle. Molarity of NaHCO3
Light Intensity 1/d² (m)
0.00
(Distilled water)
0.01
0.02
0.05
0.07
0.1
400
0.28
0.60
0.91
1.91
5.00
4.12
278
0.60
0.19
1.01
1.67
2.67
3.82
204
0.20
0.22
0.85
1.00
2.11
2.85
156
0.18
0.43
0.56
0.69
1.61
1.82
100
0.10
0.32
0.34
0.39
0.82
1.55
25

0.21
0.25
0.35
0.61
0.71
11

0.17
0.23
0.26
0.35
0.39
4

0.06
0.08
0.19
0.15
0.31
A graph of the rate of reaction against light intensity was drawn. It  shows how the amount of CO2 and light affect the rate of photosynthesis.