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

My main aim in this experiment is to find out whether Osmosis occurs in a potato and also how it affects the potato in different mol solutions of sucrose and water.

Extracts from this document...

Introduction

Osmosis Investigation Aim My main aim in this experiment is to find out whether Osmosis occurs in a potato and also how it affects the potato in different mol solutions of sucrose and water. Equipment - Cutting tile - the support for the cutting of the potato Knife - to cut the potato Measuring cylinder - to measure the solutions Distilled Water - Part of the experiment Sucrose - Part of the experiment Potato - Part of the experiment Tissue Paper - to dry out the potatoes after osmosis takes place Cork Borer - to cut out potato cylinders Ruler - measure the length of the potato Tongs - for picking the potatoes after the Osmosis has taken place Osmosis is defined as the net movement of water or any other solution's molecules from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable membrane such as a cell wall, which lets smaller molecules such as water through but does not allow bigger molecules to pass through. The molecules will continue to diffuse until the area in which the molecules are found reaches a state of equilibrium, meaning that the molecules are randomly distributed throughout an object, with no area having a higher or lower concentration than any other. ...read more.

Middle

So I predict, using all the scientific knowledge that I have gathered on Osmosis that the stronger the concentration of sucrose the shorter the length of the potato. The water in the potato transfers to the sucrose solution, because transfers from a high concentration to a lower concentration. Fair Test Fair testing should play an integral part in the experiment. The reason for this is that if I do the investigation unfairly then my results would be unreliable and would lead me to the wrong conclusions. First of all, I need to get the measurements of the potato chips exact, the reason being is that I will then have to measure the potato after the Osmosis has occurred, thus I need an exact length 2 CM for all of the potato chips. Also it will be vital for the experiment, that all the potatoes have to be covered the sucrose solution. Safety Safety is the most important thing in an experiment, even when they may seem harmless. I will be using a sharp knife to cut the potatoes into cylindrical pieces and if I don't use it properly then I could injure my self or someone else that is around me at the time of use. Method I believe that this experiment is very easy to carry out as the core of it is to potato chips in the sucrose solution over around about 24 hours, so that Osmosis can occur between the potato and the sucrose. ...read more.

Conclusion

However nothing is perfect and my results could have been slightly better. I could have made some certain procedures before doing the investigation. They maybe small things, but could have a bearing some of the results. These procedures are as followed; * Checking the mass of each potato chip * Putting all five of the potato chips in the sucrose solution at the same time. * Giving all the potato chips the EXACT time for Osmosis to take place. * Leaving all the potato chips in the sucrose solution for longer than one day, for Osmosis to reach maximum capacity. * Getting a group of people to the experiment, one to cut the potatoes, one to dry the potatoes after Osmosis has taken place. All those points can significantly improve my results, as they more or provide a better ground for Osmosis to take place. Checking the mass of the potatoes I feel was one thing I should have defiantly done. When I recorded the length of the third potato chip for the distilled water solution (in my preliminary section). I received an unreliable result, it measured at 2 CM exactly. This means that no Osmosis had taken place at all during the 24 hours allotted. This cannot be possible as some Osmosis should have taken place. I then checked the mass of the potato and found out that it was significantly lighter than the rest of the potatoes. All in all I am reasonably happy with my results; they have backed up my prediction. Treeshan Lalsing 10DH 24/09/03 ...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)

    Using the ruler to measure, cut each potato tube to 4cm in length using the scalpel. If a potato tube is shorter than 4cm, cut each potato tube to it's length so we can easily see changes in length and make the original weights as close as possible. 4.

  2. Osmosis. My main aim in this experiment is to find out if osmosis occurs ...

    I will try and get the measurements of the potatoes as accurate as possible for every single potato, evenly cutting the potato pieces, and making a record of the length to the nearest millimeter. And i will be using a very sensitive balance so that i can get the best readings possible.

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

    accurate than a ruler and would cover the likely range of sizes (from 4mm to 7mm), measure the new diameter and height of the cylinders. The results, in table and graph form are recorded below in the Results section. Results Concentration Cylinder Diameter/mm Cylinder Height/mm Volume/mm3 (2dp)

  2. Osmotic pressure

    Also, when the liquids were transferred for example from the pipette to the test tubes, there was still some liquid left in the pipette. This is an error although it is not a big one. Also, when I had to cut the potatoes tubes to size, sometimes they were cut

  1. My main aim in this experiment is to find out if osmosis occurs in ...

    And as a result, I am sure that the weight of the potato will increase largely. And because the potato tissues are surrounded by a stronger solution, it will probably become smaller, and shrink.

  2. An Experiment to Find Out How the Concentration affects osmosis

    These will be pure water, 50, 60, 70, 80, 90, and 100 percent. This will allow me to find out how the different concentrations of salt solution affect the mass of the potato. I will repeat each of the percentages three times to ensure that the results collected are as accurate as possible.

  1. In my experiment I plan to find out whether the concentration of sugar in ...

    I decided to do three of each test, due to being able to get an average from the results. The potato chips will first be cut to 4cm in length then weighed. When weighing we will only taking three potato chips at a time, hence then there won't be any confusion as to which potato chip weighs so much etc.

  2. My main aim in this experiment is to find out if osmosis occurs in ...

    of the experiment � Sucrose - molar solutions � Potatoes - to put in sucrose � Tissue paper - to dry the potatoes after the osmosis takes place � Balance - to weigh the potatoes � Cork borer - to cut out potato cylinders Prediction The potato, cut up into

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