Effect of osmosis on Plant tissues

• What do you need to investigate the effects of osmosis on plant tissues ?

  • potato
  • cork borer (to cut cylinder in the potato )
  • a scalpel (to cut the cylinder to the same length)
• What do you do to investigate the effects of osmosis on a plant tissue ?

  • first you use the cor borer to cut out three cylinders in the potato
  • then you use the scalpel to cut them all to the same length
  • measure the cylinders using a ruler and the mass of each cylinder using a balance
  • now you place each cylinder in to a test tube
  • add 10cm^3 of a o.r molar sugar solution in the first test tube
  • add 10cm^3 of 0.25 molar of sugar solution to the second test tube
  • add 10cm^3 of distilled water to the third test tube
• What do you do after putting the cylinders into the test tubes ?

  • leave them overnight for osmosis to take place
  • remove them from the test tubes and gently roll them onto towel to remove surface moisture
  • measure the length and mass of the cylinders again
• What is the equation for the percentage change in length and mass ?

  % change = change in value divided by original value x 100