Is a plastic bag a semipermeable membrane?
In this experiment, you will find out how a thin plastic bag functions as a membrane. If it is semipermeable, it will allow some kinds of molecules to pass through but not others. For example, the plastic might allow small molecules to pass through, but not larger ones. You will test two solutions—iodine and starch, each with a different size molecule—to see what happens. Before you begin, make an educated guess about the outcome of this experiment based on your knowledge of osmosis. This educated guess, or prediction, is your hypothesisAn idea in the form of a statement that can be tested by observation and/or experiment.. A hypothesis should explain these things: • the topic of the…
