RP03 osmosis

Cards (6)

  • Method
    Cut five potato cylinders of the same dimensions (lxwxh) about 3cm length
    Measure and record the mass of each potato cylinder
    Measure out 10cm3 of each of the sugar solutions and place into a labelled boiling tube
    Measure out 10cm3 of the distilled water into another boiling tube
    Add one potato piece to each tube and cover w foil
    Leave them for the same amount of time
    Remove cylinders and blot them dry w paper towels
    Re measure the length and mass of each cylinder
  • what is the formula for % change in mass?
    change in mass / initial mass x100
  • What is the dependant variable?
    Chip mass
  • what is the independent variable?
    the concentration of the sugar solution
  • what are the errors?
    the potato want fully blotted
    water may have evaporated
  • how can you reduce the effect of errors?
    repeating the experiment and calculating a mean