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Intranet

Convertir burbujas en polvo

Objetivo: Obtener un precipitado dentro del agua carbonatada

  • Material de laboratorio

    Tubos de ensayo

    Vasos

    Pipetas

  • Reactivos

    Hidróxido de calcio (Ca(OH)2)

    Agua carbonatada

  • Seguridad

    ¡¡¡No olvides los guantes, la bata de laboratorio y las gafas protectoras!!!

  • Preguntas

    ¿Qué se observa cuando se mezclan los dos líquidos?

    ¿Qué reacción se produce?

Procedimiento

  • Prepara 50 mL de una solución saturada de hidróxido de calcio.
  • Ponemos una pequeña cantidad de agua mineral carbonatada en un tubo, y en otro tubo, ponemos una pequeña cantidad de la solución saturada de hidróxido de calcio.
  • Vierte el contenido de un tubo en el otro y observa lo que ocurre.

Explicación teórica

El hidróxido de calcio lleva los iones Ca2+ y OH-. En este caso, ambos iones participan en la reacción. El agua mineral carbonatada llevaCO2 disuelto. La reacción que tiene lugar es la siguiente

CO2 + Ca2+ + 2 OH- CaCO3 + H2O

El carbonato cálcico no es soluble en agua y forma un precipitado.

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