• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

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

Extracts from this document...


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.


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.


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.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Experiment to Investigate the Effect of Temperature on the Rate of Photosynthesis in Elodea.

    Other factors involved in enzyme controlled reactions are inhibitors and activators, but neither occur in this reaction so the explanation of these factors is unnecessary. The reason the graph started to curve downwards fairly rapidly after the temperature at which maximum rate occurred is due to the denaturing of enzymes.

  2. How temperature affects the rate of photosynthesis.

    and also to obtain a more accurate angle at the end of the shoot. * Improvements to the potometer can be made. For instance a larger measuring tube can be provided which would easily accommodate a relatively large length of oxygen bubble.

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

    This was when the distance from plant to light source was 0 cm or only 5 cm. A large factor in determining data accuracy is the amount of human error during experiments. The rate at which oxygen bubbles were being produced by my plant was so high that I found it difficult to count the amount of bubbles.

  2. Absorption Spectrum of Chlorophyll.

    The exact positions of these maxima vary slightly with the nature of the solvents used (Gross, 1991). Lichtenthaler and Wellburn found that the red peak maxima of the chlorophylls were shifted to longer wavelengths with increasing polarity of the solvents.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work