A Gcse Essay On The Effects Of Osmosis On Potato Chips In Different Molar Solutions

1323 words - 6 pages

Introduction:Osmosis is a special kind of diffusion.Diffusion is the movement of particles from a high concentration to a low concentration until they are spread out evenly. Osmosis is the passage of water molecules from a region of high water concentration to a region of low water concentration through a selectively permeable membrane.The diagram below shows how water molecules move through the selectively permeable membrane from the region of high water concentration to the region of low water concentration until the concentration is equal on both sides of the membrane.Water moves between cells in plants by osmosis. Instead of measuring percentage change in mass I could have measured the ...view middle of the document...

First you cut three potato chips as close to the same size as you can, measure them, weigh them and record the results in a table.2. Then you make 10cm of 3 different molar solutions by mixing distilled water (0.0) with a 1 molar solution. For example to make 0.5 molar you would add 5cm distilled water and 5cm 1.0 molar solution. For 0.1 molar solution you would mix 9 cm distilled water and 1 cm 1.0 molar solution.3. Leave 1 potato chip in each test tube, make sure you have marked which one is which.4. After about half an hour take your potato chips out, dab them dry, measure them, weigh them and see how much they have changed and record the results in a table.5. Work out how much they have changed and see what solution has made it grow the most and shrink the most.Results for Preliminary experiment:Molar(m) Length Before (cm) Length After(cm) Mass Before(g) Mass After(g) %Mass Change0.0 3.5 3.7 2.6 2.15 + 34.60.5 3.5 3.4 2.4 1.73 - 27.91.0 3.5 3.4 2.9 1.66 - 42.8In my proper experiment I will use six different molar concentrations, they will be: 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0.Proper Experiment Method:1. First you cut eighteen potato chips (three for each concentration) as close to the same mass as you can, weigh them and record the results in a table.2. Then you make 10 cm of six different molar solutions by mixing distilled water (0.0) with a 1 molar solution. For example to make 0.5 molar you would add 5 cm distilled water and 5 cm 1.0 molar solution. For 0.1 molar solution you would mix 9 cm distilled water and 1 cm 1.0 molar solution.3. Leave 1 potato chip in each test tube, make sure you have marked which one is which.4. After about half an hour take your potato chips out, dab them dry, weigh them and see how much they have changed and record the results in a table.5. Work out how much the potato chips have changed and see which solution had made it grow the most and shrink the most.Results of proper experiment:Molar(m) Mass...

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