Osmosis

• What tool is used to cut potato cylinders in the osmosis practical?

  Cork borer
• Why is it important to cut the potato cylinders to the same length?

  To ensure consistent surface area for osmosis
• What is the required length for each potato cylinder in the osmosis practical?

  3 cm
• What should be done after cutting the potato cylinders?

  Record mass and measurements for each one
• How much of the 1M sugar solution is poured into the test tube?

  10 cm³
• What should be done with the test tubes containing sugar solutions?

  Label each test tube
• What is the concentration of the second sugar solution used in the practical?

  0.5M
• What type of water is used in the final test tube?

  Distilled water
• What is the purpose of placing one potato cylinder in each test tube?

  To observe the effects of different sugar concentrations on osmosis
• How long should the potato cylinders be left in the solutions?

  24 minutes
• What should be done after removing the potato cylinders from the solutions?

  Carefully dry them on a paper towel
• Why is it important to remember which potato cylinder is placed in which solution?

  To accurately record the mass and measurements for each condition
• What should be done after drying the potato cylinders?

  Record the mass and measurements again
• What are the steps involved in the osmosis potato practical?

  1. Cut three potato cylinders with a cork borer.
  2. Remove potato skin and measure to 3 cm.
  3. Record initial mass and measurements.
  4. Prepare three test tubes with:

  • 10 cm³ of 1M sugar solution
  • 10 cm³ of 0.5M sugar solution
  • 10 cm³ of distilled water

  1. Place one potato cylinder in each tube.
  2. Leave for 24 minutes.
  3. Remove and dry on a paper towel.
  4. Record final mass and measurements.