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

Plants take in carbon dioxide and realise oxygen using photosynthesis so I am trying to determine the rate of photosynthesis. In this experiment I will investigate how sodium hydrogen carbonate affects the rate of photosynthesis.

Extracts from this document...

Introduction

Aim Plants take in carbon dioxide and realise oxygen using photosynthesis so I am trying to determine the rate of photosynthesis. In this experiment I will investigate how sodium hydrogen carbonate affects the rate of photosynthesis. Apparatus Needed * Glass Funnel * Desk lamp * 1 Litre Beaker * Test tube * Aquatic Plant (Canadian Pond weed) * A ball of plasticine * Sodium Hydrogen Carbonate * Razor Blade * Bench lamp with a 40W bulb * 30cm wooden ruler * Clock * Stirring rod Using the Apparatus * I will follow all the lab safety rules e.g. no running, no back packs etc) * I will have to keep the lamp away from making contact with any water or moisture. * When using the razor blade I must take extreme caution as it can easily cut my finger or cause harm to others. Fair Test To ensure that a fair test is carried out I will follow the following points promptly. ...read more.

Middle

Carbon dioxide is quiet important for Photosynthesis the formula below shows how is works:- So I think the two main factors in this experiment that effect the rate of photosynthesis are the amount of energy produced by the light and the amount of carbon dioxide available to the plant so when the carbon dioxide starts running out the amount of oxygen produced will start dropping so as the level of sodium hydrogen carbonate increases the amount of oxygen produced will increase. Method * I will fill a 1 litre beaker 3/4 full with water and dissolve a fixed concentration of sodium hydrogen carbonate in it, I will use the stirring rod to help dissolve the sodium hydrogen properly. For this experiment I will be using 4 different quantities of sodium hydrogen carbonate. One concentration per experiment. o Normal No Concentration o 0.0100 mol dm-3 o 0.0125 mol dm-3 o 0.0250 mol dm-3 o 0.0500 mol dm-3 * Using a razor blade I will cut five equal size portions from the Canadian Pond weed, each from the top end of a different shoot. ...read more.

Conclusion

The results I gathered were pretty much the expected results I believe one of the key features of the success of the results was the fresh Canadian pond weed I used as in the past I have heard numerous stories about other types of pond weed such as 'Elodea' not producing the rate of photosynthesis properly because the don't last fresh for long. I also calculated the average of the results and the answers were not very different, making the results even more reliable. But I had to keep in mind that there are a few variables that could have made my experiments results wrong or different such as the heat of the bulb increased as I left it on for longer, it is a common known fact that the increase in temperature could also affect the rate of photosynthesis but I believe even if it did affect the results they would not be much different then they the correct results. Biology Coursework BY Mohammed Umar ...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. Marked by a teacher

    How the molar concentration of NaHCO3 (Sodium Hydrogen Carbonate) affects the rate of photosynthesis ...

    5 star(s)

    Time taken (seconds) Number of bubbles (3 results) Total number of bubbles Temperature (0C) 0.2 30 94,84,79 250 32 60 103,92,111 306 32 0.1 30 71,78,74 224 32 60 82,84,94 260 32 0.05 30 62,98,88 248 32 60 82,88,94 254 32 0.025 30 48,90,84 222 32 60 94,86,89 269 32 0.01 30 7,8,7 22 32 60 6,7,7 20

  2. Marked by a teacher

    investigate the effect of carbon dioxide concentration on the rate of photosynthesis.

    4 star(s)

    Light here is the limiting factor. People grow plants in greenhouses to keep the plants warm and help them to grow faster. Some people burn charcoal in greenhouses. As well as warming the air it puts in carbon dioxide to help the plants grow.

  1. Marked by a teacher

    The Effect of Carbon Dioxide Concentration On The Rate of Photosynthesis.

    4 star(s)

    First, use distilled water in test tube (0 molar) and count the number of oxygen bubbles given off every 2 minutes. 4. Then do the experiment a further 5 times using a range of solutions with a different Sodium hydrogen carbonate solution molar. 5. In each experiment use the same piece of pond weed with the same apparatus set up exactly the same using the same amounts.

  2. Experiment to investigate the effect of Carbon Dioxide on the Rate of Photosynthesis

    The equation below shows this: NaHCO3 (aq) + H2O (aq) --> NaOH (aq) + CO2 + H2O The equation shows how carbon dioxide is released when sodium hydrogen carbonate is mixed with hydrochloric acid, NaHCO3 reacts in the same way when dissolved in water - it releases carbon dioxide as a gas.

  1. Effect of Sodium Hydrogen Carbonate Concentration on the Rate of Photosynthesis

    This will then be displaced in a graph of rate of photosynthesis against the concentration of sodium hydrogen carbonate. Results Concentration of Sodium Hydrogen Carbonate (mol dm-3) Time (minutes) and Distance travelled by Meniscus (mm) 3 (mins) 6 (mins) 9 (mins)

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

    The ATP then passes to the light-independent reactions. Non-cyclic photophosphorylation involves both photosystems in the 'Z scheme' of electron flow. Light is absorbed by both photosystems and excited electrons are emitted from the primary pigments of both reaction centres (P680 and P700).

  1. 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,

  2. How temperature affects the rate of photosynthesis.

    The shape of the graphs and the results obtained made me realise that the rate of photosynthesis mainly depends on the functioning of enzymes. The graphs showed an increase in the average rate of oxygen production between 0 oC -45 oC (with peaks forming at approximately 42 oC i.e.

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