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Intranet

Monedas impecables

Objetivo: Limpiar el óxido presente en las monedas de cobre

  • Material de laboratorio

    3 placas de Petri

    3 monedas de cobre

    Papel pH

  • Reactivos

    Vinagre

    Sal

    Agua

  • Preguntas

    ¿Qué se puede observar? ¿Qué está ocurriendo?

Procedimiento

  • En la primera placa de Petri, coloca una capa de vinagre (suficiente para cubrir completamente la moneda). En la segunda placa, añade una capa de vinagre saturada de sal.
  • En el tercer plato, añade sólo agua con sal.
  • Coloca una moneda de cobre en cada placa de Petri, de modo que quede completamente cubierta por el líquido. Espera 1-2 minutos y observa lo que ocurre.
  • Mide el pH de las tres soluciones utilizando papel de pH.
  • Enjuagamos bien las monedas con agua y las secamos con papel.

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