• 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)

    There were 5 celeriac discs per test tube and 6 test tubes all together. Therefore, when I placed the celeriac discs into one test tube I started the stopwatch. This meant that I had to quickly fill the remaining 5 test tubes with the celeriac discs.

  2. Marked by a teacher

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

    4 star(s)

    I had performed the prior test using only 2 solutions, of concentrations 0 molar and 1 molar. The time duration I used was only 10 minutes and used 4 potato strips for each solution. Firstly, I had to prepare the 1 molar solution.

  1. Investigation on Osmosis using a potato.

    results by mass, it could well have affected the surface area and so the overall rate of osmosis.

  2. 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.

  1. Investigating Water Potential Of Potatoes.

    As water molecules continue to move from beaker to funnel a hydrostatic pressure develops in the latter. The head of pressure, which can be developed by a solution when permitted to take up water by osmosis, is known as osmotic pressure.

  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. 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.

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

    My method of cutting the chips is to use the chips extruder to make chips in identical cross-section areas, and then they will be lined up and using a ruler to make a 90� angle straight cut, so that they would be cuboids with identical cross-section areas and lengths.

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