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

To find out which concentrations of sucrose solution cause water to be gained or lost by osmosis in potatoes.

Extracts from this document...

Introduction

INVESTIGATING OSMOSIS IN POTATO'S Aim: To find out which concentrations of sucrose solution cause water to be gained or lost by osmosis in potatoes. Background: The spontaneous passage or diffusion of water or other solvents through a semi permeable membrane (one that blocks the passage of dissolved substances--i.e. solutes). The process, important in biology, was first thoroughly studied in 1877 by a German plant physiologist, Wilhelm Pfeiffer. Earlier workers had made less accurate studies of leaky membranes (e.g., animal bladders) ...read more.

Middle

Increasing the pressure on the solution by a specific amount, called the osmotic pressure, can stop this process. The Dutch-born chemist Jacobus Henricus van't Hoff showed in 1886 that, if the solute is so dilute that its partial vapor pressure above the solution obeys Henry's law (i.e., is proportional to its concentration in the solution), then osmotic pressure varies with concentration and temperature approximately as it would if the solute were a gas occupying the same volume. ...read more.

Conclusion

Turgor is very important to plant cell's because it helps the plant's to be firm. We can use the kinetic theory to try and explain the factors affecting the rates of reactions. This is also known as the Collision The collision theory says that: Chemical reactions occur when particles of the reactants collide. They must collide with a certain minimum energy, called the activation energy The particles must collide with enough energy (activation energy) otherwise they will. Just bounce off each other harmlessly. The activation energy is needed to break the bounds in the particles and get the reaction started. ...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 the water potential of celeriac.

    5 star(s)

    I also found it difficult to cut such a small depth accurately. This meant that there was a chance of the discs being cut too long or too short, which would have affected the results. Another source of error I found was timing all of the celeriac discs correctly.

  2. Marked by a teacher

    Osmosis. Aim: To find the molarity of potato tubers cell sap. BIOLOGICAL ...

    4 star(s)

    This is because the cells have more number of free water molecules than the solution. So, water molecules will exit the cell to maintain concentration on either side of the semi-permeable membrane. As concentration of the solution the cell is in increases, the length and mass decrease also increases.

  1. Investigation on Osmosis using a potato.

    0.10m, 1.15m, 1.20m, and so on. This way would have allowed me to also find out the isotonic point far more accurately then the ones I estimated in the past experiments.. The cutting of the potatoes was the most difficult part of the experiment as although I was recording my

  2. Investigating Water Potential Of Potatoes.

    If the concentration of solute is the same on both sides of the membrane, water molecules will move equally in both directions. If the solute concentration is greater in the beaker than in the funnel, there will be a net movement of water in the opposite direction -from funnel to beaker.

  1. Osmosis In Potatoes.

    in graph 1, the potato chip used for 0 molar concentration will gain water, as the water moves from a region of high concentration (the solution) to a region of low concentration (the potato chip.) This result will be an example of when the solution is Hypotonic to the potato.

  2. Osmosis in potatoes.

    In did this by setting up an experiment and then putting the results into a table and using that information to answer my questions. I left the chips in for thirty minutes. These were the results: Size of Chip Concentration of Sucrose (M)

  1. In this Sc-1 experiment, we are going to put potato chips into different concentrations ...

    be cut into two or three chips that are 2cm long, which saves using a lot of chips (I will be using 3 chips for each cup, and I will be having 14 cups, which makes 42 chips in total!).

  2. permeability of beetroot membranes

    The potato tissue has a certain negative value. If the glucose solution has a greater negative value than the potato tissue, and is therefore of a higher concentration, the potato tissue will lose water by osmosis until the concentrations are equal or until the potato has lost all its water.

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