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t = 0 min

t = 0 min. Après ajout de 3 gouttes de (Na + (aq) + HO - (aq) ) à c = 0,10 mol.L -1 , sinon coloration du BBT jaune (eau distillée un peu acide…). t = 0 min. t = 5 min. Après avoir difficilement brisé l’enrobage à coup de spatule. t = 5 min. t = 5 min. t = 15 min. t = 20 min. t = 20 min.

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t = 0 min

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  1. t = 0 min Après ajout de 3 gouttes de (Na+(aq) + HO-(aq)) à c = 0,10 mol.L-1, sinon coloration du BBT jaune (eau distillée un peu acide…)

  2. t = 0 min

  3. t = 5 min Après avoir difficilement brisé l’enrobage à coup de spatule

  4. t = 5 min

  5. t = 5 min

  6. t = 15 min

  7. t = 20 min

  8. t = 20 min

  9. t = 27 min

  10. t = 37 min

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