Effect of Different Concentrations of Sucrose Solutions on Potatoes BY adjutant’s 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 in each region.

Involved in this process are hypotonic, hypersonic and isotonic solutions. A hypotonic solution is one with a lower osmotic pressure, indicating that the net movement of water moves into the said solution whereas a hypersonic solution is one with a higher osmotic pressure, thus the net movement of water will be leaving the hypersonic solution. Lastly, an isotonic solution entails no net movement of water across a semi-permeable membrane as the two substances involved display osmotic equilibrium. Hypothesis The more hypersonic potato cores are to sucrose solution, the more weight potato ores gain.

On the other hand, potato cores will decrease in weight when it is hypotonic to sucrose solution. Variables: Dependent: The final mass of the potato cores Independent: Concentration of sucrose Controlled: Size of potato, time spent in solution, amount of solution Method for Collecting Data: We decided to do a range of about 4. Egg per piece of potato in each concentration of sucrose. Equipment: sucrose solutions Distilled water 6 universal bottles Witt a lids 6 labels Cylinder Knife/ scalpel Ruler Paper towels Weight

Procedures: 1 . Collect 6 universal bottles with a lids and 6 labels. Write your each concentration on the bottle. 2. Look at the list of concentrations and find out which concentration of solution you will be using. 3. Use a measuring cylinder to measure 20 ml of the sucrose solution into your each bottle. 4. Use a “syringe borer” to cut a cylinder of potato. Press down on a white tile. Use a knife or scalpel to cut off any skin. 5. Use a ruler to measure a 2 CM length of potato core. Cut off any excess. Try and make your cut at 90 0 to the sides of the core. 6.

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