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Intranet

Erupció del volcà

Objectiu: Simular l’erupció d’un volcà

  • Material de laboratori

    Un matràs Erlenmeyer de 250 ml

    Un vas de precipitats

    Espàtules

    Balanç

    Cilindre graduat

    Envàs de plàstic

  • Reactius

    Sabó de plats

    Bicarbonat de sodi

    vinagre

    Colorant alimentari

    Aigua

  • Seguretat

    No oblideu els guants, la bata de laboratori i les ulleres de seguretat!!!

  • Preguntes

    Quina reacció té lloc en aquest experiment?

    S'allibera algun gas? Quina?

    És adequat algun àcid per a aquest experiment? I alguna base?

Procediment

  • Afegiu 100 ml de vinagre a un vas de precipitats.
  • Al matràs Erlenmeyer, afegiu 50 g de bicarbonat de sodi, 50 ml d’aigua destil·lada, 2 gotes de colorant alimentari i un raig de sabó per a plats.
  • Col·loqueu el matràs Erlenmeyer al recipient de plàstic.
  • Barrejar bé durant un parell de minuts. No tot es dissolrà, però alguns ho faran.
  • Finalment, introduïu ràpidament el vinagre al volcà.
  • Allunya’t ràpidament!

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