Osmosis Practical

Question 1

Step 1

Answer 1

Using a cork borer cut 6 potato cylinders of the same diameter and trim them each to 3cm in length.

Question 2

Step 2

Answer 2

Fill a test tube with 10cm^3 of pure water 5 more test tubes with the same volume but different concentrations of sugar solutions - 0.2 moles, 0.4 moles, 0.6 moles, 0.8 moles and 1 mole.

Question 3

Step 3

Answer 3

Measure and record the mass and length of each of the potato cylinders.

Question 4

Step 4

Answer 4

Leave one cylinder in each beaker and leave them, set a timer for 3 hours

Question 5

Step 5

Answer 5

After 3 hours take the cylinders out and take care to gently pat them dry with a paper towel.

Question 6

Step 6

Answer 6

Measure and record the new masses and lengths of the cylinders

Question 7

Independent variable

Answer 7

. concentration of sugar solution

Question 8

Dependant variable

Answer 8

.chip mass / percentage increase in mass of potato chips

Question 9

Control variable

Answer 9

.time left in solution
. age of potato
.temp
.surface area of potatoes
.volume of solution
.type of sugar/sugar solution used