Osmosis

• 1. Cut a potato into identical cylinders - identical mass
• 2. After patting each potato dry, add them into a beaker containing different concentration solutions
• 3. Leave the potato for 24 hours
• 5. Remove the potato from each cylinder and dry them, remeasure their masses. An increase = lower concentration than the solution, A decrease = higher concentration than the solution
• 5. Repeat three times for each concentration and find a mean
• To improve accuracy:

  • Repeat and find a mean
  • Use a vermier capillar instead of a ruler to measure length
  • Use a balance with a higher accuracy
  • Use different concentrations of solution
• Risk assesment:

  • Cutting the potato - sharp knife - carry facing the ground and cut away from the body
  • Avoid coming into contact with the solutions - wash hands