osmosis

• What is the aim of the osmosis required practical?

  To investigate the effect of salt or sugar concentrations
• What should be prepared for the osmosis practical?

  Samples of potatoes in different concentrations
• What measurements should be taken before and after soaking the potato samples?

  Mass and length of the samples
• How is the percentage change in mass calculated?

  Using measurements before and after soaking
• What steps should be followed in the osmosis practical?

  • Prepare potato samples
  • Place in different concentrations of solutions
  • Measure mass and length before and after
  • Calculate percentage change in mass
  • Plot and interpret graphs
• What types of solutions can be used in this practical?

  Salt or sucrose solutions
• How many different concentrations should be used in the practical?

  At least five different concentrations
• What equipment should be used for measuring solutions and potato lengths?

  Appropriate measuring equipment
• What is the independent variable in this experiment?

  Concentration of salt or sucrose solution
• What are the dependent variables in this practical?

  Mass and length of potato cylinders
• What control variables must be maintained during the experiment?

  Type and volume of solute, temperature, time
• Why is it important to record measurements accurately?

  To ensure reliable and valid results