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

Find out the Effect of Sugar Concentration on the Movement of Water in Plant Cells.

Extracts from this document...

Introduction

SCIENCE EXPERIMENT OSMOSIS Title Experiment to find out the Effect of Sugar Concentration on the Movement of Water in Plant Cells. Aim To test for osmosis. We shall be seeing if the level of sugar concentration affects the rate and the amount of water being passed through the cells in a potato chip. Prediction I think that if you increase the level of sugar concentration in the mixture, less water will be passed through the potato chips cells because the cells will be thicker and stronger. This will only allow a little bit of water to pass through. Background Information (See Appendix A) Method 1. Collect 5 plastic dishes (5cm diameter) and label with the level of sugar concentration you will be testing for. You only need 1 dish per level of concentration. 2. Cut sufficient pieces of chips from potatoes. You need enough to place 1 in each dish. It doesn't matter if they are not of equal size. 3. Place a piece of chip next to each dish. 4. Electronically measure the weight of each piece of chip and record this information. Place the chip next to the tub it was taken from, once weighed. ...read more.

Middle

The change in weight of the potato is an outcome and can be different all time. I cannot change it. Results Experiment Number 1: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 9.59g 9.49g -0.1g Decrease *0.4 7.67g 7.84g +0.17g Increase 0.6 5.80g 5.95g +0.15g Increase 0.8 7.02g 7.06g +0.04g Increase 1.0 8.90g 8.96g +0.06g Increase Experiment Number 2: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 2.74g 2.62g -0.12g Decrease *0.4 3.83g 3.97g +0.14g Increase 0.6 9.26g 9.35g +0.9g Increase 0.8 4.67g 4.80g +0.13 Increase 1.0 5.14g 5.22g +0.8g Increase Experiment Number 3: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 3.82g 3.69g -0.13g Decrease *0.4 6.32g 6.40g +0.8g Increase 0.6 3.40g 3.57g +0.17g Increase 0.8 4.66g 4.85g +0.19g Increase 1.0 4.19g 4.41g +0.22g Increase Experiment Number 4: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 7.90g 7.90g 0.0g The Same *0.4 3.34g 3.46g +0.12g Increase 0.6 3.16g 3.35g +0.19g Increase 0.8 1.54g 1.76g +0.22g Increase 1.0 3.73g 3.95g +0.22g Increase The Average Experiment This is the table showing the averages of the previous 4 experiments. ...read more.

Conclusion

Evaluation There is only 1 major anomaly that can be seen from the results. The change in weight when the sugar concentration was 0.6. All others around this concentration were plus 0.1g but this was plus 0.4g. There are many reasons for this high result. It could have been: * Time - I could have removed the potato too late or put it in too soon * Potato - the potato could have been covered in an unknown substance * Sugar - the concentration may have been altered and not what it said it was * Me - I could have accidentally changed the sugar concentration. I had no problems with this experiment. The instructions were easy to follow and carry out. All I had to was collect the equipment ad run the experiment. If I was to repeat this experiment I would make sure that I had an acid level for 0.2 and the main thing would be to make all the potatoes weigh the same. Approximately 5g. this would make it fairer. Future experiment would involve performing the osmosis on an animal cell and even different plant cells to see if that makes a difference. I could try different levels of acid, or make a new variable instead of the sugar concentration. ...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 Life Processes & Cells 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 Life Processes & Cells essays

  1. Marked by a teacher

    The aim of this investigation is to find out how the concentration of the ...

    4 star(s)

    The Factors affecting the Rate of Osmosis There are four main factors that affect the rate of osmosis; * Temperature of the place where osmosis occurs * Time the plant is given to perform osmosis * Size of the plant where osmosis is occurring * Concentration of the solutions that

  2. Efeects of Osmosis in Plant Cells

    The visking tubing represents the plant cell vacuole, in this experiment. After I have done this I will then dry and weigh the bags and record the results. Once I have done this, I will then place the visking tubing bags in the following range of sucrose solutions: 0.0, 0.2, 0.4, 0.6, 0.8, 1.0 moles/litre, in a glass beaker.

  1. An experiment to show the movement of water into and out of plant cells ...

    If however it is a strong solution e.g. salt the opposite will happen the potato will shrink because water leaves its cells due to osmosis happening. The water will get pushed out by the salt solution this will happen until the water and the salt solution are equal meaning that it has gone lighter and has lost weight.

  2. Osmosis is defined as 'the movement of water molecules from an area of high ...

    Method In the actual experiment, instead of using a cork bearer of 10mm diameter, we had to use a cork bearer of 8mm diameter. Although there was a change in plans, I don�t think this change would affect neither my hypothesis, nor my results that we got.

  1. How Does Osmosis Affect Plant Cells?

    and fairer, in case I got any odd results they would even themselves out when an average was calculated) into each of the 6 beakers and was to leave them in for a set time (I decided the set time by using the time in my preliminary work were the greatest change in mass occurred)

  2. Use scientific knowledge and practical skills to determine the effect of a range of ...

    In my investigation I am going to be investigate the factors affecting the rate of Osmosis. Some factors affecting this are: Length - of membrane Temperature - of water Concentration - of solution The factor I am going to investigate is the length.

  1. Investigate the movement of water into and out of plant cells by osmosis.

    A solution that contains more solute particles than another, and hence has a low water potential, is referred to as being hypertonic, whilst the less concentrated solution is hypotonic. The concentration of solute particles is described as a molarity. One mole of any substance is the mass of 6.02 x 1023 particles of the substance.

  2. The aim of this experiment is to find out how different concentrations of sugar ...

    * Mass of potato. The mass of each potato rod will need to be as similar as possible by weighing the rods before and after placing it in the sugar solution. This will also be made sure by using a cork borer for each of the potato rods.

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