Question bank8.1 Exchange surfaces and diffusion

8.1 Exchange surfaces and diffusion

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Question 17

In a laboratory exchange chamber, glucose diffuses through a permeable membrane that is $μm30\,\mu\mathrm{m}$ thick at a rate of $min−18.0\,\mu\mathrm{g\,min^{-1}}$ .

The membrane is replaced by a membrane of a different thickness, and the rate of glucose diffusion increases to $min−112.0\,\mu\mathrm{g\,min^{-1}}$ . The surface area and concentration difference remain constant.

Using Fick's law, what is the thickness of the replacement membrane?

[1]

$μm26\,\mu\mathrm{m}$

$μm45\,\mu\mathrm{m}$

$μm20\,\mu\mathrm{m}$

$μm15\,\mu\mathrm{m}$

In a laboratory exchange chamber, glucose diffuses through a permeable membrane that is $μm30\,\mu\mathrm{m}$ thick at a rate of $min−18.0\,\mu\mathrm{g\,min^{-1}}$ .

Using Fick's law, what is the thickness of the replacement membrane?

$μm26\,\mu\mathrm{m}$

$μm45\,\mu\mathrm{m}$

$μm20\,\mu\mathrm{m}$

$μm15\,\mu\mathrm{m}$

8.1 Exchange surfaces and diffusion

Question 17

Markscheme

8.1 Exchange surfaces and diffusion

Question 17

Markscheme

8.1 Exchange surfaces and diffusion

Question 17

8.1 Exchange surfaces and diffusion Questions

8.1 Exchange surfaces and diffusion

Question 17

8.1 Exchange surfaces and diffusion Questions