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

The aim of my osmosis coursework is to determine the concentration of cell sap, inside a potato.

Extracts from this document...

Introduction

Osmosis Coursework- Preliminary Work Aim The aim of my osmosis coursework is to determine the concentration of cell sap, inside a potato. I will determine the concentration of cell sap by, using different concentrations of sucrose solution outside the potato. I will do this to this to see, which solution best matches the cell sap inside the potato. If the water is less in the potato, then the potato will gain water and increase in mass. However if the water is more in the potato, then the potato will lose water and decrease in mass. This therefore means, if the sucrose concentration outside equals the concentration of cell sap inside, there will be no net movement of water (osmosis). So, if there is no net movement of water, the potato's mass will stay the same. Fair Test In order to make my experiment a fair test, I will keep the following constant: The amount of sucrose solution used. ...read more.

Middle

This is because it was left in the solution longer than any other. I am also going to use the same balance to weigh my potato chips. This is because the measurements may slightly vary between scales. Prediction I predict that the lower the concentration of the sugar solution in the test tube the larger the mass of the potato will be. This is because the water molecules pass from a high concentration, the water, to a low concentration, in the potato chip. Therefore, the chips in higher water concentrations will have a larger mass than in higher sugar concentrations. Equipment In order for me to do this experiment, I will need the following equipment: * Fresh white potato * Five test tubes * Different concentrations of sucrose solution * Cork borer * White tile * Scalpel * Ruler Before I do my final experiment, I will have to do some preliminary work first. For my coursework I have to do preliminary work because, the concentration of the sucrose needs to be very precise, in order to get accurate results. ...read more.

Conclusion

After completing my preliminary experiment I produced the following results: Sucrose Concentration (%) Starting Mass Of Potato Chip (g) Final Mass Of Potato Chip (g) Change in Mass Of Potato chip (g) 10% 2.5 2.9 0.4 20% 2.5 2.0 0.5 30% 2.5 1.7 0.8 40% 2.5 2.0 0.5 50% 2.5 1.9 0.6 From my preliminary work I discovered that, the largest mass change occurred from, the thirty percent sucrose solution. The least change occurred from the smallest concentration of sucrose solution, ten percent. This meant that I would use a range of sucrose solutions, either side of ten percent for my real experiment. Therefore for my real experiment I have decided, to use the following range of sucrose solutions: 4%, 8%, 10%, 12% and 14 % sucrose. Using this range will, give me an accurate result for the sucrose solution in the potato. Initially, for my range I had decided to use, three percentages of sucrose solution, on either side of the ten percent sucrose solution. However, there were not any other sucrose solutions available, so I had to do alter my range. ?? ?? ?? ?? Harinder Sandhu ...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 Miscellaneous 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 Miscellaneous essays

  1. GCSE Maths Statistics Coursework

    1.70?x<1.75 3 7 1.70?x<1.75 0 6 1.75?x<1.80 0 7 1.75?x<1.80 1 7 1.80?x<1.85 1 8 1.80?x<1.85 1 8 1.85?x<1.90 0 8 1.85?x<1.90 0 8 1.90?x<1.95 0 8 1.90?x<1.95 0 8 I have plotted the cumulative frequency of all the boys and all the girls on to two graphs.

  2. child development coursework visit 2

    For my second activity which was the reading activity Harris and I as well as his mother sat down on the floor and looked through the book it was a colourful book where you had to find objects such as 'cars'.

  1. The final voyage

    miseries, my hallucinations, the man, the raffle ticket and the brochure for the cruise liner. Apparently, he also bought a ticket and is looking forward to the draw show that is on Channel Four at 7pm. That was all I needed to know to look forward to what could be

  2. Climate Change

    the radio stations this would have doubled the impact our project had on people, not just family and friends, but people across the nation. Overall I think that the whole project was very effective and created quite an impact on me, my group and also my family and friends.

  1. Statistics Coursework

    22 �14,237.00 �7,100.00 20000 197 �31,710.00 �12,960.00 12000 56 �18,995.00 �7,570.00 55000 26 �8,500.00 20000 150 �9,450.00 �5,050.00 10000 138 �19,800.00 �2,310.00 10000 74 �10,995.00 �3,080.00 40500 110 �19,977.00 �8,230.00 20000 70 �10,482.00 �4,915.00 17500 115 �15,640.00 �4,635.00 16890 163 �20,980.00 �10,555.00 12500 156 �45,025.00 �7,735.00 12000 91 �20,220.00 �7,675.00

  2. Humanities Coursework Oldham

    think its weird which can lead unfair opinions that leads to racism. Stereotypes and generalisations about a person or group of people; People develop stereotypes when they are unable to or unwilling to gather all of the information needed to make a fair judgement.

  1. Obesity. In this project I hope to aim to locate the function of the ...

    In May 2007 an estimated one in every 5 men and a quarter of women were obese and that a number as large as 30,000 people die too early due to obesity related conditions. In my opinion this number is horrendous.

  2. Citezenship coursework

    This information used is also secondary data as there is no indication of primary data ever being collected. The cause for creating help the aged is a genuine and the information I have seen has given a good clear view of their goals and how they help, and how you can too.

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