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Investigate the effects of sucrose concentration on osmosis in potato chips

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Introduction

Investigate the effects of sucrose concentration on OSMOSIS in potato chips Problem What is the effect of sucrose concentration on OSMOSIS in potato chips? Introduction/Plan Osmosis is the diffusion of water from a dilute solution to a more concentrated solution through a partially permeable membrane that allows the passage of water molecules but not solute molecules. Pure water Sugar dissolved in water We can investigate this by placing a potato chip into pure water and weighing it before and after it is placed in the beaker of liquid. I then will gradually increase the concentration of the sucrose solution to see what effect this will have on the mass of the potato chip. Independent Variable * I am going to change the concentration of the sucrose/sugar solution. Dependent Variable * I am going to measure the mass of the potato chip and the amount of liquid in the beaker. Controlled Variables * To make this a fair test I will need to make sure I: * Use the same size of chip (2mm) ...read more.

Middle

Weigh the chips on the scales after leaving them for one hour in the solution. 8. Do it again Test 1 Concentration (mol/litre) Weight (g) Weight After (g) % Change in mass 0.0 1.51 1.71 13.25% 0.2 1.42 1.51 6.34% 0.4 1.48 1.39 -6.08% 0.6 1.47 1.25 -14.97% 0.8 1.46 1.13 -22.6% 1.0 1.53 1.19 -22.22% Test 2 Concentration (mol/litre) Weight (g) Weight After (g) % Change in mass 0.0 1.46 1.65 13.01% 0.2 1.42 1.49 4.93% 0.4 1.48 1.41 -4.73% 0.6 1.54 1.32 -14.29% 0.8 1.44 1.16 -19.44% 1.0 1.42 1.12 -21.13% Average Average Concentration (mol/litre) Average Weight (g) Average Weight After (g) Average % Change in mass 0.0 1.485 1.68 13.13% 0.2 1.42 1.5 5.635% 0.4 1.48 1.4 -5.405% 0.6 1.505 1.285 -14.63% 0.8 1.45 1.145 -21.02% 1.0 1.475 1.155 -21.675% Weight Change Concentration (mol/litre) Conclusion My hypothesis was correct. From this investigation I noticed that at the start the mass of the chip increased and them it began to decrease towards the end of the experiment. ...read more.

Conclusion

The surface area of the potato chips were not all the same, the results would have been more reliable if they were all the same mass to begin with. This would have made it a fair test, as the sucrose concentration would have had the same surface area to react upon. To provide additional evidence I could have included concentrations that increased by 0.1, this would have also increased the accuracy of my results. I could have also used different types of potatoes and sizes. Safety * Make sure all bags are under desks so no one is liable to trip or fall. * Walk slowly as you may trip or collide with another person * Be sure to hold scalpel appropriately as injury could occur. * Be careful not to spill solution onto floor as someone may slip. If you do happen to spill the solution, be sure to clean it up immediately. * Make sure you follow all the instructions of your teacher. * Make sure all apparatus is put away in their proper place. * Do not carry to many pieces of apparatus at once. Mikaela Mullen ...read more.

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