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

How do different concentrations of sucrose solution effect potato tissue?

Extracts from this document...

Introduction

Background Information Osmosis is the movement of water molecules though a partially permeable membrane from an area of high water potential to an area of low water potential. The membrane lets small water molecules pass though but not large ones. The flow continues until the concentration becomes the same on the inside as on the outside. This is called equilibrium. Molarity is a measure of contestation. Aim How do different concentrations of sucrose solution effect potato tissue? Prediction Based on my background information, I predict that the potato will change in mass and in length. I believe this because each Molarity of sucrose will change the potato's water content. This will happen because either the concentration will higher in the sucrose and lower in the tubers or lower in the sucrose and higher in the tubers. ...read more.

Middle

cut 30 pieces of potato to 1 cm length using a ruler and knife, and weigh each ones starting mass * I will put 25 cm3 of the 5 different sucrose solutions into 30 test tubes and add all the 1 cm potato cuttings into the solutions * I will then add these into the rack * I will leave for 15 minutes * Now I will measure the ending length and mass * I will add this information into the table created at the start and compare the results Preliminary Results After we did the Preliminary test we decided to use 1 cm long 4 mm diameter tubers. We would put them in 25 cm3 sucrose solutions. ...read more.

Conclusion

Conclusion My results show that as you increase the sucrose solution consecration the weight of the potatoes tuber goes up. This is because the water potential inside the tissue is lower than the sucrose solution; this means water passes though the partial permeable membrane into the cell. The result showing the length of the tuber did not show a distinct pattern this may be because we could only measure to one decimal place. You can be more accurate with a top pan balance because it goes to two decimal places and it is digital not analogue like a ruler. Results Graphs Dave Richens Osmosis Investigation Coursework Page 1 of 4 ...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

Here's what a teacher thought of this essay

3 star(s)

An average write up, although the results are not very accurate due to the potato not being left for long enough. A results table has been left out with is unhelpful when trying to anaylse results. 3 stars.

Marked by teacher Louise Star 10/04/2013

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

    Affect Of Varying Salt Concentration on Red Blood Cell Haemolysis

    4 star(s)

    meaning 80% of light had passed through solution, and at its least at a concentration between 0.9 and 1.0 % which is very close to the isotonic value of 0.9% where the absorbance reading was 81%. This suggests that the red blood cells are very much more suited to a

  2. Marked by a teacher

    An Investigation into the Water Potential Of Root Vegetables.

    4 star(s)

    I plotted my results on a graph (overleaf) to find the concentration o the isotonic solution for each vegetable. I then found the water potential of the vegetables by referring to a graph showing water potential (kPa) at various sucrose solution concentrations.

  1. Marked by a teacher

    Mr Chips: Investigation to find an isotonic solution for potatoes

    4 star(s)

    4.75 3.45 -1.30 -27.4 The results from this test show that only the zero percentage concentration caused the potato to draw water in through osmosis, the amount was also very low allowing for the presumption that these particular potatoes did not contain a high level of sugar therefore have a low level water potential within their cells.

  2. Marked by a teacher

    Investigating osmosis in plant tissue.

    3 star(s)

    of the potatoe into the sucrose solution, thus leaving the cell flaccid. Rate of reaction Molarity I also believe that the rate at which osmosis occurs is proportional to the concentration of water. As you can see from the graph, as the difference in concentration between the solution and the

  1. Osmosis in Living Tissue.

    3 1 cm chunks * The bored potato will not be 1 cm, so cut it on a measuring tile to 1 cm using a razor * Skewer the 1 cm potato chunks onto a pin with a small gap in between * Weigh the pin with the chunks on

  2. The Effect of Different Substrates on the Rate of Respiration on Yeast (Saccharomyces cerevisiae).

    Anaerobic respiration releases much less energy than aerobic respiration, only 210KJ compared to 2880KJ. In anaerobic conditions most energy remains locked in the ethanol. One problem is that alcohol is poisonous in large amounts. If the concentration of alcohol gets more than 14% it kills the yeast and the fermentation stops.

  1. beetroot experiment

    50-70�C particles vibrate faster due to higher kinetic energy, so diffusion is also affected. In this case, the pigment has higher chance of being diffused out. Also, the cell membrane has small proteins embedded. Some of which occupy a whole small part.

  2. An investigation to see whether the concentration of Sucrose effects the amount of Carbon ...

    I was able to show that as the concentration of the sucrose solution increased the amount of respiration occurring increased up until a certain point, which was 15% sucrose solution, beyond this concentration the overall mass lost decreased a tiny bit, this indicates that the amount of respiration occurring decreased.

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