The Effect of Sucrose Solution Concentration on Osmosis in Potato Chips
Plan
I am going to cut six pieces of potato using a borer. They will all
the same weight. I will make them all 0.7g. I will be able to make
sure they are all the same weight-using scales. If a piece of potato
is too big I will use a scalpel and a tile to trim it so they are all
the same weight and then place these into a test tube each. I will
hold the test tubes in a test tube rack. Using the measuring cylinder
I will measure 10ml of each strength of sugar solution rinsing the
measuring cylinder after each measure. This will then be added into
separate test tubes with the pieces of potato. E.g. a piece of potato
will have 0.0M strength; a piece of potato will have 0.2M strength and
a piece of potato will have 0.4M strength etc. I will put a sticky
label on each test tube stating what strength of sugar solution it
contains. I will then leave these for 2 hours and see what happens
then record my results.
APPARATUS
A potato
Sugar solutions (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0)
Borer
Scalpel
Tweezers
Scales
6 test tubes
Test tube rack
Measuring cylinder
I will measure the amount of sugar solution in the test tubes. I will
change the strength of sugar solution in each test tube. To make the
experiment a fair test I will keep the weight of the pieces the same
weight I will also only add the same amount of sugar solution. I think
that the higher the molar used the lighter the weight of the potato
chip after the experiment. I believe this will happen because osmosis
is the movement of high concentration ton low concentration.
Observation / Results
Molar Used
Starting Weight (g)
Test 1 (g)
Difference between Starting & Test 1
Test 2 (g)
When the cell has all the water it can take inside of it the osmosis
Investigate how the Concentration of Sucrose Solution affects the Mass of the Potato Chip Aim To find out how the concentration of sucrose solution affects the mass of the potato chip left in the solution for one day. Water Potential: The water potential of a solution is a measure of whether it is likely to lose or gain water molecules from another solution. A dilute solution, with its high proportion of free water molecules, is said to have higher water potential than a concentrated solution, because water will flow from the dilute to the concentrated solution (from a high potential to a low potential). Pure water has the highest possible water potential because water molecules will flow from pure water to any other aqueous solution, no matter how dilute. Prediction: Osmosis is the passage of water molecules from a weaker solution to a stronger solution, though a partially permeable membrane.
B will have this size potato in but cut in half and Test tube C will
molecules go in and out of the cell. There is no net movement of water
Investigate the Osmosis of Potato Cells in Various Salt Solutions. Introduction I have been asked to investigate the effect of changing the concentration of a solution on the movement of water into and out of potato cells. I will be able to change the input of my experiment. The input variable is the concentration of the solution.
I am going to carry out an experiment to measure the change in mass of
cork borer and a ruler. I will keep the potato chips the same size in
Size of potato-will be the same as it will be cut using a cork and borer which cuts them all to the same diameter.
the same brand of potato. By doing this I will make it a fair test.
repeat the process 3 times in total to ensure a fair test. At the end
When I am not using them I will place them away from my experiment and
Investigation of the Concentration and the Effect of Sucrose on Osmosis in Apple and Potato Tissues
We then cut our potato tubes with the cork borer and cut them with the scalpel so they were the same length and weighed them. We then put one potato tube in each test tube and then added the same amount sugar solution in to each tube. The concentration of sugar solutions varied in each test tube.
4. Put each group of potato discs in one of the 6 test tubes and watch
When you place a potato chip in a salt or sugar solution, then if the