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

An Experiment To Investigate The Amount Of O Given Off By Elodea With Varying Concentrations Of NaHCO

Extracts from this document...

Introduction

An Experiment To Investigate The Amount Of O Given Off By Elodea With Varying Concentrations Of NaHCO Aim- To investigate the amount of O given off by the Elodea with varying amounts of concentrations of NaHCO . The rate of photosynthesis is measured by counting the number of bubbles of O being produced during that process. Introduction- Photosynthesis is the process in which plants take in energy from the sunlight. It is then converted into food energy. It is responsible for all carbon compounds in living organisms. When a plant cell absorbs the suns light, H O and CO it gives out oxygen and glucose. Graphs to show photosynthesis- This graph shows that the light intensity speeds up photosynthesis, but only to a certain point, and beyond that the increase of light intensity has a small effect. ...read more.

Middle

The CO varies due to the changes in the NaHCO solution concentrations. Variables, Affecting Photosynthesis: - CO - H O - Chlorophyll - Light - Temperature Prediction- The greater the sodium hydrogen carbonate solution concentration, the greater the rate of photosynthesis. The sodium hydrogen carbonate solution concentrations doubles so also the rate of photosynthesis will. When there is less concentration of carbon solution then the bubbles will be quicker and there will be more of them. So photosynthesis is quicker and more oxygen is produced. Equipment: - Pond weed (Elodea) - Beaker - Sodium hydrogen carbonate solution (NaHCO ) various amounts- 0.000M, 0.025M, 0.050M, 0.100M, 0.200M, 0.400M. - Light (lamp) ...read more.

Conclusion

My results get faster as there was more sodium hydrogen carbonate used. A few of my results don't follow the others, so they don't support my prediction because they are not as close to the line of best fit; this might be because the concentration of sodium hydrogen carbonate was measured wrong. Improvements/sources of errors- The graph curves to the left like it supposed to because the higher the concentration the more amount of bubbles dispersed. The few odd results which aren't near the line of best fit are wrong due to human error either using the wrong amount of concentration or the bubbles might have been counted wrong or the elodea was damaged so didn't produce the right amount of oxygen. John George 4PJG ...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.

    * What apparatus should be used to produce the most accurate results? * What concentration of hydrogen carbonate should be used? * How far away should the lamp be positioned? * What range of temperature readings should be used in order to support a firm conclusion?

  2. Determine the water potential of potato tuber cell with the varying affect of solute ...

    You can see this by looking at table 1. I knew this prediction was correct because the rate of water entering the cylinder will be quite close to the rate of water going out of the cylinder. I also predicted that the loss of mass would be -0.15g which is very surprisingly accurate.

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

    rate of respiration and p/s is equal - there is no gaseous exchange with the air; in bright light however p/s is faster than respiration and thus O2 is given out - CO2 is taken in to use for p/s and the CO2 made from the plant's respiration is also used to make O2.

  2. How temperature affects the rate of photosynthesis.

    The triose phosphate is then converted to amino acids, lipids and glucose while some of it is regenerated to form Ribulose Bisphosphate with the help of ATP (which is converted to ADP). Therefore the overall rate of photosynthesis is increased.

  1. The aim of this experiment is to investigate the factors affecting photosynthesis in Elodea.

    Below is a graph showing the optimum temperature for enzyme activity. Concentration of carbon dioxide and the amount of water supplied affect the rate of photosynthesis because carbon dioxide and water are both needed for photosynthesis to occur. If the concentration of carbon dioxide and the amount of water supplied

  2. This experiment involves using a photosynthometer to investigate how temperature affects the rate of ...

    which are used in the light independent (temperature dependant) reactions to form triose phosphate. Oxygen is simply a waste product photolysis. The Z scheme is illustrated below: Fig 3 - obtained from: http://www.scool.co.uk/topic_quicklearn.asp?loc=ql&topic_id=15&quicklearn_id=2&subject_id=3&ebt=83&ebn=&ebs=&ebl=&elc=13 It is this light independent stage which is affected by the temperature because it involves an enzyme,

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