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Migration des ions

Migration des ions. Observations expérimentales. Solutions utilisées. Solution de dichromate de potassium 2 K + + Cr 2 O 7 2-. Solution de sulfate de cuivre II Cu 2+ + SO 4 2-. Mélange des deux solutions. Dispositif expérimental: - tube en U - deux électrodes en graphite.

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Migration des ions

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  1. Migration des ions Observations expérimentales

  2. Solutions utilisées Solution de dichromate de potassium 2 K+ + Cr2O72-

  3. Solution de sulfate de cuivre II Cu2+ + SO42-

  4. Mélange des deux solutions

  5. Dispositif expérimental: - tube en U - deux électrodes en graphite

  6. Remplissage du tube en U: le mélange en partie basse surmonté par une solution incolore d’acide sulfurique 2 H+ + SO42-

  7. Le circuit électrique

  8. Après 15 minutes

  9. Après 30 minutes

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