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

How does changing sucrose concentration affect the process of osmosis and therefore plant material?

Extracts from this document...


How does changing sucrose concentration affect the process of osmosis and therefore plant material? Introduction We will be investigating the effect of changing sucrose concentration on osmosis and therefore plant material. Osmosis is the flow of one constituent of a solution through a membrane while the other constituents are blocked and unable to pass through the membrane. Experimentation is necessary to determine which membranes permit selective flow, or osmosis, because not all membranes act in this way. Many membranes allow all or none of the constituents of a solution to pass through, only a few allow a selective flow. In a classic demonstration of osmosis, a vertical tube containing a solution of sugar, with its lower end closed off by a semi-permeable membrane, is placed in a container of water. ...read more.


The level of liquid in the tube of sugar solution will eventually rise until the flow of water from the tube of sugar solution, under the influence of hydrostatic pressure, equals the flow of water into the tube. The hydrostatic pressure establishing this equality of flow is called osmotic pressure. A variety of physical and chemical principles are involved in the osmosis in animals and plants. Osmosis affects the size and turgidity of a plant cell, this means that when a plant cell is placed in a solution that has a higher sucrose concentration the plant cell, by using osmosis will expand and therefore becomes turgid, Turgid means swollen and hard The diagram below explains this process. ...read more.


I also believe there will be some correlation between sucrose concentration and the expansion of the cell. Prediction I predict that the higher the concentration of sucrose, the more the cell will expand. Method I will place 4 pieces of potato in 4 separate beakers containing different concentrations of Sucrose. I will keep the potatoes the same size so as to keep the experiment fair. I will repeat the experiment twice as to get a better set of results. Apparatus For my investigation I will need: 4 beakers 4 slices of potato 4 solutions with varying concentrations of sucrose I will set up this apparatus as shown below. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Exchange, Transport & Reproduction 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 AS and A Level Exchange, Transport & Reproduction essays

  1. Marked by a teacher

    Investigate a factor which can affect the process of osmosis in a living plant ...

    4 star(s)

    The volume of the sucrose solution If the volume of solution does not cover the whole chip then this would affect the results, as osmosis will not be occurring over the largest area possible, which it should be. Make sure the dilutions add up to the same volume.

  2. Marked by a teacher

    Investigating how changing the concentration of sucrose, affects the time it takes for a ...

    3 star(s)

    temperature, volumes of space in which enzymes are kept and Ph as well as others. The number of collisions between the substrate and enzyme will increase, because of the collision theory, which states that some collision cause chemical reactions, and as in this experiment, some collisions indirectly cause the rate

  1. The Effect of Sucrose Concentration on Osmosis.

    We then decided to choose on the potato shape: Method 1. Set up apparatus needed in preliminary work. 2. Measure out 25cm� of pure (distilled) water and pour into a test tube. 3. Measure out 25 cm� of 80% sucrose solution and pour into a second test tube.

  2. Investigation on Osmosis using a potato.

    We will then put them back in the test tubes with the solutions in them and leave them for another 2 hours. 10. We shall then use tissues to wipe off any excess water which will make it a fair test and give us the accurate results that we want.

  1. Osmosis - Examining the Effect of Different Molar Sucrose Solution On Plant Tuber or ...

    than a test tube rack which cannot hold some of the test tubes. 10cm : To measure the 10 cm of the mixed molar solution into the 5 test tubes for each molarity 50 cm beaker: To mix both amounts of needed molar solutions, which would then be divided into 5 parts equally.

  2. Investigating osmosis on swede cells.

    Width of swede chip Control Simply using a cork borer of a certain size can control this; I intend to use size 5. As long as the same cork borer is used throughout the experiment then all the swede chips shall have the same diameter, and this will mean that

  1. permeability of beetroot membranes

    We decided to measure how changing the concentration of the glucose solutions affected the rate at which osmosis takes place in potato tissue. Our controls for this experiment were the amount, size and shape of potato, the apparatus used and the volume of solution used for each concentration.

  2. light on plant growth

    10 4 0 0 Analysis: The pilot study results show that cotton wool is the best growth medium for the cress. This is because the filter paper dried up too quickly and did not have good water retention. The seeds were often dry within a couple of hours.

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