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To Investigate The Affect Of Concentration Of Salt Solution On The Mass Of Potato Chips.

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Introduction

To Investigate The Affect Of Concentration Of Salt Solution On The Mass Of Potato Chips Aim: The aim of this investigation is to see whether the amount of salt solution affects the mass of the potato chip Hypothesis: In the solution below, water will diffuse from the dilute solution into the concentrated solution through the process of osmosis. Therefore the dilute solution level will fall and the concentrated level will rise When a substance such as salt dissolves in water, the substance's molecules stick with some of the water molecules, so the concentration of the water molecules decreases. When the water molecules are the same concentration on both sides of a semi permeable membrane and salt is dissolved into one of them, osmosis will occur as shown in the diagram below. Semi permeable membrane Water molecules Salt molecules Osmosis is the movement of water molecules across a semi permeable membrane from a region of high water concentration to a region of low water concentration. My prediction in this investigation is that the solution with the least salt will make the potato weigh more, thus the potato in the distilled water solution will ...read more.

Middle

Putting the potatoes in the molar solutions at 2 minute intervals would mean I'd be able to take them out at 2 minute intervals. This would allow all of the potatoes to stay in the solution for the same consistent time. Diagram/ Apparatus: Test tube, electronic scales, paper towel, cork borer pipette scalpel, white tile, measuring cylinder and potatoes. Safety Precautions Be extremely careful whilst using the scalpel and cork borer by paying a attention to what you are cutting and wear goggles at all times. Method: I collected all the equipment necessary and also two medium sized potatoes. 0.5, 1.0, 1.5, 2.0 2.5 of molar solutions containing sodium chloride and also distilled water (0.0) I added 100ml of each solution into a measuring cylinder then into the measuring beaker. I then cut the potatoes into round cylindrical shapes then cut them into 4cm; also cutting off the skin of the potato this would eliminate the investigation being biased, as all the potatoes would have been the same size and none of them would have had the skin. ...read more.

Conclusion

Conclusion: My hypothesis was correct as it says that 'the solution with the least salt will make the potato weigh more, thus the potato in the distilled water solution will weigh the heaviest, because there will be a higher concentration of water molecules in the distilled water than inside the potato cylinder. Therefore, water will move in from high concentration to low concentration this will increase the mass of the potato. Evaluation: To make this more of a fair test I should not have guesstimated that all the chips would be the same mass I should have weighed three together giving me a grand total, which I would have recorded; this may have made my results more accurate. Another way I could have made my results more accurate is by doing the test three times this would have widen my results and sum mishaps that I encountered; (such as the first set of results the mass before and after being put in the molar solution) in the investigation would have been rectified. The temperature in the science laboratory could have affected my results so I kept referring back to the temperature through out the investigation and it was 210C for the whole duration of the lesson. Dharam Taylor 11AP Mr Shorter 1 ...read more.

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