Lab: Diffusion Across a Semi-permeable Membrane

Question 1

Question 1

Revolt · Accepted Answer

the dialysis tubing. After 15 minutes, a sample was taken. That sample showed that glucose was found: inside; the dialysis tubing.: outside

Question 2

The independent variable in this experiment was , and the dependent variable

Revolt · Accepted Answer

A: molecule size

Question 3

The tubing contains ✔ starch solution Lugol’s solution starch solution and Lugol’s solution. The beaker

Revolt · Accepted Answer

A: starch solution

Question 4

Initially, glucose was found only ✔ insideoutsideboth inside and outsideneither inside nor outside the dialysis tubing. After 15 minutes, a sample was taken. That sample showed that glucose was found

Revolt · Accepted Answer

A: inside

Question 5

If a test had been done of the solution inside the dialysis tube, what do you think the results would have been?

Revolt · Accepted Answer

C: The glucose would be found because it would reach an equilibrium.

Question 6

Analysis: diffused though the semipermeable membrane.

Revolt · Accepted Answer

D: Only glucose (smaller molecules)

Question 7

Starch molecules are too large to pass through the tubing into the beaker. Which errors could have caused starch to appear in the beaker despite this fact? Check all possible errors.

Revolt · Accepted Answer

A: not washing the outside of the tubing after filling it with starch; B: reusing droppers for different solutions; D: using a beaker that had not been cleaned thoroughly

Question 8

Based on what you learned in the lab, why does your body need to break down starch into glucose?

Revolt · Accepted Answer

B: Starch molecules are too large to diffuse into cells.

Question 9

was .

Revolt · Accepted Answer

B: ability to diffuse

Question 10

contains .

Revolt · Accepted Answer

B: Lugol’s solution

Lab: Diffusion Across a Semi-permeable Membrane Answers

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