capstone

 

Experiment 2: Concentration Gradients and Membrane Permeability

In this experiment, you will dialyze a solution of glucose and starch to observe:

• The directional movement of glucose and starch. 
• The effect of a selectively permeable membrane on the diffusion of these molecules. 

An indicator is a substance that changes color when in the presence of a specific substance. In this experiment, IKI will be used as an indicator to test for the presence of starch.