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2003
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In the Classroom
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JCE Classroom Activity
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Diffusion of Water through a Differentially Permeable Membrane
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Maria Guadalupe Bertoluzzo, Fabio E. Quattrin, Stella Maris Bertoluzzo, and Ruben Rigatuso
Facultad de Ciencias Bioquímicas y Farmacéuticas, Unr. Suipacha 531-(2000) Rosario, Argentina
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September 2003
Vol. 80 No. 9
p. 1032A
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| Abstract |
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When a solution of potassium hexacyanoferrate(II), K4Fe(CN)6, comes in contact with a solution of copper(II) sulfate, CuSO4, a colloidal precipitate, copper(II) hexacyanoferrate(II), Cu2Fe(CN)6, is formed according to the reaction 2Cu2+(aq) + [Fe(CN)6]4-(aq) → Cu2Fe(CN)6(s). In this Activity, students investigate the process of osmosis through the differentially-permeable membrane formed by this precipitate.
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| Supplement |
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The Activity includes an additional extension in "More Things to Try".
Students view red onion cells under a microscope, first in a solution of distilled
water and then in a solution of sodium chloride. Two photos that show red onion
cells in an isotonic solution and in an hypertonic solution are available here.
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| More Information |
 Citation |
Bertoluzzo, Maria Guadalupe; Quattrin, Fabio E.; Bertoluzzo, Stella Maris; Rigatuso, Ruben. J. Chem. Educ. 2003 80 1032A.
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Keywords |
Diffusion; Mechanisms; Physical Chemistry
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History |
Created:
Last Updated: |
August 4, 2003
February 28, 2005
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1032A
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