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

AIM To investigate the effect of osmosis on potato when put in different concentrations of sugar solution.

Extracts from this document...

Introduction

BIOLOGY EXPERIMENT OSMOSIS AIM To investigate the effect of osmosis on potato when put in different concentrations of sugar solution. INTRODUCTION: Osmosis is a special type of diffusion of water molecules through a semi permeable membrane usually occurring in living organisms .It occurs both in plant and animal cells. The only difference being that plant cells have larger vacuoles and cell walls due to which they do not burst , whereas animal cells do burst due to excess water intake , and the plant cells become TURGID.( firm and rigid) , whereas if there is a water loss it becomes FLACCID OR PLASMOLYSED ( shrinking) ...read more.

Middle

2) Using the scalpel again make a deep " U" shaped dent in each of the potato chips which have been cut.( Make sure they are not too deep and take care that which cutting the dent , the other side is not cut or osmosis will not occur) 3) Measure the length of each chip using a ruler accurately. 4) Put the 10%, 20% , 30% , 40%, 50% sugar solutions in individual potato chips ( not all in one) , and name the potato chips , in which the individual sugar solutions are poured. 5) Start the stop watch. 6) After one hour, take out the chips and dry them. 7) Measure the length of each chip now.( accurately) ...read more.

Conclusion

the sugar concentration in the solution increased the size of the potato started decreasing as the water concentration inside the potato was more, therefore it gave out water instead of absorbing it, hence it reduced in size after 1 hour. EVALUATION: The results we got were decent and somewhat near our expectations however some unintentional errors may have occurred and varied our results thankfully, the hypothesis was proved correct We may have been subject to human error as we may have not accurately measured the length of each chip, secondly the chips may not have been cut absolutely equally, and the size and shape of the dent to some extent may have been a hindrance to the accuracy of our results. ...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 Green Plants as Organisms 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 Green Plants as Organisms essays

  1. The effect that different concentrations of salt solution in the water has on strips ...

    osmosis, but in rich salt solution the potato shrink because water leaves their cells due to osmosis. And as the potato strips shrink they will decrease in mass. This is the reason why I think the mass of the potato strips in the water will decrease as the concentration of salt solution in the water is increased.

  2. Investigate the cell sap concentration of solute in a potato chip using osmosis and ...

    The amount of water in the chips in weaker solutions would have been decreased because the lack of energy in the molecules would mean that less were able to get into the chip in the time space, likewise, the water molecules in the chips that were in solutions above 6%

  1. To find out what happens when potato chips are put in different strength sugar ...

    This happens in our experiment because; the outer layer of the potato chips is a partially permeable membrane. These have tiny holes in them, which only water molecules can get through. Inside the potato chips there are sugar molecules and a few water molecules.

  2. Determine the water potential of potato tuber cell with the varying affect of solute ...

    will have the 0.20 mol dm-3 solute in the other test tube and so on. This means that we have to vary the concentration of the solutes. This variation must be controlled. I will do this by making sure the solution is not changed once it is at the desired concentration.

  1. osmosis. I will be investigating the effects of different concentration of sugar solution will ...

    To make my experiment fairer I will make sure, when I put the potato pieces inside the test tubes that they are all 50mm long. In addition, they are taken out of the test tube in the same order they went in.

  2. The aim of this experiment is to determine the water potential of celeriac cells ...

    Water potential is calculated using the formula "Q [= ]Q[s + ]Q[p]". When a cell's ?Q[s]? =[ ]?Q[p]?, the water potential is 0, and the cell is fully turgid. Plasmolysis begins at the point when Q[p] = 0, since there is no longer any turgor pressure against the cell wall.

  1. Change in mass of potatoes in different concentrations of sugar solution.

    Osmosis also occurs in amoeba, as they require the nutrients from the water. The concentration of water inside the amoeba is lower than outside therefore it allows water to move into the cell. As this carries on, it will burst because it has no cell wall.

  2. To Investigate the Effect of Water and Sugar Solution of different Concentrations of the ...

    This makes the cell turgid and full of water. The Vacuole increases in size and the cell membrane presses against the cell wall, making the cell wall stretch. The cell increases in mass and volume and becomes well supported. Diagram 3.

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