Osmosis Required Practicle

Question 1

How do i investigate the range of concentrations of salt or sugar solutions on the mass of plant tissue

Answer 1

• Use a cork borer to cut out equal-sized cylinders from a potato.
• Cut them to the same length using a ruler and scalpel
• Blot them gently to remove excess moisture, and weigh each chip using a balance. Record the initial mass.
• Set up a series of labeled boiling tubes or beakers with different concentrations of sugar or salt solution
• Place one potato chip into each tube.
• Leave them in the solution for at least 30 minutes, or longer if specified.
• Remove and weigh again:
• Take out each potato chip.
• Gently blot dry with paper towel to remove excess solution (do not squeeze).
• Re-weigh and record the final mass.


Question 2

Independent variable

Answer 2

Concentration of the salt or sugar solutio

Question 3

Dependant variable

Answer 3

Change in mass

Question 4

Control varible

Answer 4

Volume of solution
Size and surface area of potato chips
Type of potato
Time potato chips are left in the solution
Temperature of the environment