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Intranet

Lápices conductores

Objetivo: Realizar la electrólisis del agua utilizando lápices como electrodos

  • Material de laboratorio

    Vaso

    Cables conductores con pinzas de cocodrilo

    Pila de 9 V

    2 Lápices

    Cartón

    Cucharada

  • Reactivos

    Agua

    Sal marina

  • Preguntas

    ¿Qué ocurre cuando los cables están conectados a la batería?

    ¿Qué reacción se produce?

    ¿Por qué se añade sal?

Procedimiento

  • Afila las dos caras de los lápices y sujeta los alambres a ellas utilizando las pinzas de cocodrilo.
  • Llena el vaso de precipitados con agua del grifo y disuelve una cucharada de sal marina.
  • Haz dos agujeros en el cartón por los que pasarán los lápices (los extremos donde no hay cables).
  • Coloca el cartón con los lápices sobre el vaso de precipitados y conecta los extremos libres de los cables a los bornes de la pila.
  • Observa lo que ocurre.

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