Question

A student investigated the diffusion of substances through Visking tubing, an artificial membrane
which has some of the properties of cell membranes. The student made a bag of Visking tubing as shown in Fig. 6.1.


Fig. 6.1
The student added some iodine solution to the water in the test-tube. After 30 minutes at room temperature, the contents of the Visking bag were stained blue-black, but the water outside remained a yellow colour.
(a) (i) Explain these results [4]
(ii) State three factors that influence the movement of molecules through membranes. [3]
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Answer 1

Answer:

don't know bro

Explanation: