Lab: Diffusion Across a Semi-permeable Membrane Answers

Did you read the Student Guide carefully?

✔ CX Vmaterial used as the membrane

✔ CVamount of substances used

whether the molecules diffused through the membrane (tubing)

Now label the variables: Molecule size is the variable. The ability of the

material to diffuse is the variable.

Think about the lab procedure you just read. Label each factor below V if it was variable during the procedure or C if it was constant.X C✔ Vmolecule size (large starch molecules vs. small glucose molecules)

✔ CVnumber of trials

Now label the variables: Molecule size is the ✔ independentdependent variable. The ability of the

Did you read the Student Guide carefully?

Think about the lab procedure you just read. Label each factor below V if it was variable during the procedure or C if it was constant.molecule size (large starch molecules vs. small glucose molecules)

whether the molecules diffused through the membrane (tubing)

Select all steps below that help you handle chemicals safely.

X C✔ Vwhether the molecules diffused through the membrane (tubing)

material to diffuse is the independent✔ dependent variable.

material used as the membrane

Select all the reasons for checking glassware for cracks or chips prior to use.

amount of substances used