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# The effect that chlorophyll has on the rate of photosynthesis in elodea.

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Introduction

The effect that chlorophyll has on the rate of photosynthesis in elodea Prediction I predict that the larger the amount of chlorophyll (size of plant). The more oxygen will be produced therefore the more photosynthesis will occur. The Graph shows that there is a steady increase in photosynthesis and there is no optimum. Theory and background Sunlight CarbonDioxide+water=========Glucose+oxygen Chlorophyll 6co2 + 6h20 ==========c61206 + 602 When plants make Carbohydrates they combine Carbon dioxide and water to make glucose and oxygen. Energy is needed to make them combine. Plants use sunlight, But with just sunlight water and carbon dioxide mixed together will not react. ...read more.

Middle

0.5g of sodium hydrogen carbonate (NaHCO3) was then added it was left to equalise for about 2minites then A stopwatch was started and bubbles counted for 1minites. This was repeated 2 more times. Then the elodea was taken out and cut 2cm shorter to 8cm and placed with new water in the test-tube along with another 0.5g of sodium hydrogen carbonate. Once again it was left to equalise then the bubbles were counted and repeated. The experiment was then done for measurements of 6cm, 4cm, and 2cm. The results for each length were then averaged and a graph and results table drawn. ...read more.

Conclusion

the more bubbles (oxygen) is produced. We can display these results in a graph. A graph to show the amount of oxygen produced by a plant. Conclusion I have found out that the more chlorophyll there is the more oxygen is produced. This statement supports my prediction. Evaluation To improve this experiment, I would repeat it so I got a more accurate average. I also would have collected the oxygen and measured the volume as bubbles are irregular sizes so it is not accurate. The water in the test-tube could have been measured more accurately using a burette. Tom Honey 10 ...read more.

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# Related GCSE Green Plants as Organisms essays

1. ## How temperature affects the rate of photosynthesis.

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2. ## Investigation To Find The Effect Of Temperature On The Rate Of Photosynthesis Of Elodea.

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All green plants contain chlorophyll a and chlorophyll b in their chloroplasts. Chlorophyll b differs from chlorophyll a by having an aldehyde (-CHO) group in place of a methyl group (-CH3) (Gross, 1991). This aldehyde group is also the reason that chlorophyll b has a greater molecular weight than chlorophyll a.

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