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

Investigate what concentration of sucrose solution is isotonic to potato cell sap.

Extracts from this document...

Introduction

Biology Coursework - Osmosis - To Investigate concentration of sucrose solution is isotonic to potato cell sap. Biology Coursework - Osmosis Planning Aim: To investigate what concentration of sucrose solution is isotonic to potato cell sap. Apparatus:0M sucrose (aq) (distilled water) 2M sucrose (aq) Potato Chip cutter Knife Boiling tubes Measuring cylinder (25cm3) Vernier callipers (to nearest 0.1mm) Balance (to nearest 0.01gram) Safety: I will ensure safety around the lab by: wearing safety goggles, laying paper towels, removing baggage from walking space, push stools under the bench, stand up, walk carefully and slowly - don't rush and handle equipment and apparatus carefully. Preliminary Experiment: I did a small experiment before doing the real one so I could find a suitable range to base my investigation round. I used 3 chips in 3 boiling tubes, each containing 20cm3 of: 0M sucrose, 0.5M sucrose and 1M sucrose. studentcentral.co.uk Moles of Sucrose /M Original Mass /g Mass after 3 hours /g Up/Down in mass wwfb fbw stfbfbud efb fbnt cfb enfbtral fbcofb uk. 0M 8.02 wwcb cbw stcbcbud ecb cbnt ccb encbtral cbcocb uk. ...read more.

Middle

In all things, everything moves from high concentration areas to low concentration areas, when in water, this process is called 'Osmosis'. With potato (plant) cells, it swells up as water enters via osmosis, however, it won't burst because the cell wall is tough, and it only stretches out slightly. When it can't stretch anymore, it is called 'Tugor'; this is what makes the plant firm and stand up. The opposite, when the cell membrane shrinks to its limit because of lack of water, is called 'Plasmolysis', which makes the plant wilt. wwdf dfw stdfdfud edf dfnt cdf endftral dfcodf uk; Obtaining Moles of Sucrose /M Original Mass /g This coursework from www.studentcentral.co.uk (http://www.studentcentral.co.uk/coursework/essays/2020.html) Reproduction or retransmission in whole or in part expressly prohibited Mass after 3 hours /g Up/Down in mass Gain/Loss /g wwgg ggw stggggud egg ggnt cgg enggtral ggcogg uk! 0.1M 9.09 9.94 Up +0.85 0.2M 9.26 wwcd cdw stcdcdud ecd cdnt ccd encdtral cdcocd uk; 9.97 Up +0.71 0.3M 9.07 9.12 Up +0.05 0.35M 9.13 9.06 Down -0.07 0.4M from www.studentcentral.co.uk 9.09 8.00 Down -1.09 0.5M 9.58 wwea eaw steaeaud eea eant cea eneatral eacoea uk. ...read more.

Conclusion

It could be because I didn't dry it enough when I went to measure them after the 3 hours, which I think, is the most plausible one. A part from that, most or all my results were very accurate. BuRX7 from BuRX7 student BuRX7 central BuRX7 co BuRX7 uk I would probably spent more time getting more results than the few I had, and investigated further into the exact concentration that is isotonic to potato cells, which I figure is now between 0.3M and 0.35M sucrose (aq). wwec ecw stececud eec ecnt cec enectral eccoec uk: If I had repeated each concentration about 3 times, I could average them and get a more reliable graph and table of results to base my conclusion on. The potato has approximately have a 0.325M concentration of sucrose in its cells, if I were to put a potato chip in 0.325M solution of sucrose, its size and mass should not change if my results are correct. If both have the same concentration of sucrose, osmosis won't occur, as nothing is higher or lower in concentration. Made available free online by www.studentcentral.co.uk. Reproduction in whole or in part expressly prohibited. (c) studentcentral.co.uk - www.studentcentral.co.uk. ...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

    Sand Dune Succession Coursework

    5 star(s)

    levels of pH and humus in the surface layers of the dunes aswell as the plant diversity. I feel these factors will produce reliable and precise results that will show clear trends when analysed by using a plant species identification card, the reliability of results is greatly improved as the

  2. Marked by a teacher

    Biology coursework planning - the effect of lead chloride on the growth of cress ...

    5 star(s)

    It is also best to have no other minerals or ions present, other than the lead chloride being investigated. This is so that any differences in the results are due to the lead chloride only. * Beakers will be used to contain the lead chloride and distilled water because it

  1. Marked by a teacher

    Mr Chips: Investigation to find an isotonic solution for potatoes

    4 star(s)

    Table 1 Data recorded from the preliminary experiment Concentration (%) Weight of potato chip (g) Change in mass (g) Percentage change % Before After 0.0 5.18 5.46 0.28 5.4 1.0 4.79 4.41 -0.38 -7.9 2.0 3.91 3.10 -0.81 -20.7 3.0 3.21 2.25 -0.96 -29.9 4.0 574 4.32 -1.42 -24.7 5.0

  2. Marked by a teacher

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

    4 star(s)

    Therefore, the concentration of the solution, the cell is in, plays a major role in the occurrence of osmosis. The types of solutions and its effects are as follows: Hypotonic Solution: Hypotonic solution is less concentrated than the concentrated solution in the cell's cytoplasm and the cell sap in its vacuole.

  1. Marked by a teacher

    Biology Coursework - Osmosis - To Investigate concentration of sucrose solution is isotonic to ...

    4 star(s)

    I will then place the 5 identical chips in each boiling tube and leave for 3 hours so osmosis can occur fully. Scientific Knowledge: A potato's cell has a fully permeable cell wall, but a selectively permeable cell membrane, which allows certain substances to enter and not enter the cell, such as water and sucrose in this instance.

  2. Investigation on Osmosis using a potato.

    and therefore the weight should decrease or increase, not noticeable for us to observate efficiently. But because of such high molars of sucrose, the water can diffuse all the way, throughout the two substances, equalling the concentration gradient of the two substances.

  1. Design an experiment to investigate the effect of temperature on the movement of a ...

    Continued care to the wound is also important. Washing the area gently with soap and water daily without scrubbing is best as the wound heals. Avoid putting products such as hydrogen peroxide, alcohol, or iodine solutions in the wound. These only delay wound healing and do not do anything to prevent infection.

  2. What is the isotonic point of a plant cell?

    * Pen * Ruler * Chipping machine * 2 Scales (correct to 0.01 grams) * Clock (I originally planned to use a stop clock, but on the day the other class was using them all so we had to make do with a clock correct to the nearest second).

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