Osmosis Introduction This Experiment Will Show How Changing Sugar Solutions Causes Potato Cells To Take In or Water By the Process of Osmosis.

There are two ways that the molecules move through the membrane: passive transport and active transport. Active transport requires that the cell use energy that it has obtained from food to move the molecules (or larger particles) through the cell membrane. Passive transport does not require such an energy expenditure, and occurs spontaneously.

The principle means of passive transport is diffusion. Diffusion is the movement of molecules from a region in which they are highly concentrated to a region in which they are less concentrated. It depends on the motion of the molecules and continues until the system in which the molecules are found reaches a state of equilibrium, which means that the molecules are randomly distributed throughout the system.

Fair test

• To make it a fair test I will make sure the potato always weighs the same
• I will also make sure I always have the same amount of concentrated sucrose solution
• And I will also keep the potato in the beakers for the same amount of time

Method

• 6 beakers filled  with different concentrated sucrose solution, I used 30cm3 sucrose solution each time to make sure I stick to my fair test
• I cut out 6 lengths of potato and weighed them
• Then I left a piece of potato in each beaker before I re-weighed it
• Once I weighed I recorded the changes in my table s below

Results