GCSE - Human Physiology and Health An experiment to investigate what affect sucrose solution has on potato tissue. Background Osmosis is the movement of water molecules‚ across a partially permeable membrane from a region of high concentration of water to a low concentration of water molecules. A partially permeable membrane is a membrane with holes in it small enough for only water to go through it. Big molecules like glucose cannot fit through it. Osmosis allows plants to take in water
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Biology Investigation: Effect of different concentrations of sucrose solutions on the mass of potatoes Research question Is the mass of potatoes going to be smaller or bigger in different sucrose concentration? Introduction Osmosis is a process that occurs at a cellular level that entails the spontaneous net movement of water through a semi-permeable membrane from a region of low solute concentration to an area of high solute concentration in order to equalize the level of water
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concentrations of sucrose solution‚ and measure any changes in mass and length. Affecting Factors: There are a number of factors which can affect our results. We need to keep them all the same‚ and make sure that the only thing that changes is the concentration of the sucrose solution. These factors include: • Starting length of potato • Volume of Sucrose solution • Temperature of potato • Temperature of Sucrose solution • Time we left the potato in the Sucrose solution for
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CHAPTER I INTRODUCTION Background of the study “Pain is only what you allow it to be”.- Cassandra Clare Pain is a subjective experience‚ and infants and children respond to pain with the behavioural reactions that depend upon the age and cognitive processes. Pain may occur as a result of procedures‚ surgery‚ illness or injury. During infancy‚ reflective behaviour is dominant. Between 3 and 10 months of age
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An investigation to find the water potential of potato and carrot tubers in a sucrose solution‚ of concentration 0.00 – 0.50Mol‚ over a 24 hour period Interpretation Written Communication C1 From our graph it can be seen that the concentration of sucrose solution is 0.18 M at 0% change in mass for the potato and 0.355 M at 0% change in mass for the carrot. I will use these values to find the solute potential by using the calibration graph. I will work out the water potential by using the
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mass decreased as sucrose concentration increased‚ therefore‚ relative osmotic concentration also decreased as sucrose concentration increased. However‚ the osmotic concentration of 0.2 M sucrose solution was relatively greater than that of 0.1 M sucrose solution. In sucrose concentration 0.5 M‚ the osmotic concentration decreased slightly from that of 0.4‚ but significantly from those of all other sucrose concentrations. The osmotic concentrations were greater than zero in sucrose solutions of 0
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oxygen‚ water‚ amino acids etc. to pass through but will not allow larger molecules like sucrose‚ starch‚ protein etc. through. A region of high concentration of water is either a very dilute solution of something like sucrose or pure water. In each case there is a lot of water: a high concentration of water. A region of low water concentration is the opposite of the above‚ i.e. a very high concentration of sucrose solution: a low water concentration. The water content of plants varies depending on
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celery‚ Gala apple‚ Navel orange‚ and Imperator carrot). The fruit or vegetable will be placed in six 56.7 gram cups‚ ranging with sucrose molarities of 0 (distilled water)‚ 0.2‚ 0.4‚ 0.6‚ 0.8‚ 1.0‚ with 5 trials‚ leading to 30 cups for each produce variable. Dependent variable: The water potential of the produce‚ found by placing the produce in different molarities of sucrose and finding the isotonic state of the produce with a plotted line graph. Controlled variables: The controlled variables include:
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According to the data from both the lab group and the class average‚ there is evidence that osmosis did occur in the bags. The largest change in mass was in the 1.0M sucrose bag the mass went from 12g initially to 14.2g‚ this gained 2.2g‚ an 18.3% change in mass for the group data over the duration of the experiment. The 0.2M bag went from 10.2g to 10.9g a 6.9% change in mass; the 0.4M bag went from 12.1g to 12.2g .83% change in mass; the 0.8M bag went from 10.9g to 12.2g and an 11.9% change in
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__________________ Materials Aprons/Goggles Potato Slice (2-3cm thick) Potato Borer Triple beam balance 6 x 100mL beakers plastic wrap Paper towel 50mL Distilled Water 50mL 0.2M Sucrose solution 50mL 0.4M Sucrose solution 50mL 0.6M Sucrose solution 50mL 0.8M Sucrose solution 50mL 1.0M Sucrose solution Procedure 1. Label each beaker with the assigned solution. 2. Pour 50mL of the assigned solution into each beaker. 3. Use a Potato Borer and cut out 6 potato cylinders. (Do
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