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Iones con actitud

Toca ahora conocer el mundo de los oxoaniones, que son especies que derivan de un oxoácido, en el cual se ha perdido uno o varios átomos de hidrógeno. Los oxoaniones son especies negativas formadas por oxigeno, otro elemento (no metal o metal de transición de alto estado de oxidación) y a veces hidrógeno.

Sulfato
A partir de pxhere.com. Sulfato (CC0)

¡Adelante con los oxoaniones!

Formulamos y nombramos oxoaniones

Duración:
3 sesiones
Agrupamiento:
Individual y en grupo

Empezaremos informándonos sobre los oxoaniones, para posteriormente realizar una infografía y actividades de entrenamiento y juego, finalmente nos evaluamos mediante una actividad de nivel de logro en oxoaniones.

Planificamos nuestras actividades:

  1. Nos informamos
  2. Comprobamos en grupo si entendemos toda la información recibida, mediante una puesta en común. Lo que no hemos entendido lo aclaramos en el grupo de clase con el profesor o profesora
  3. Realizamos una infografía de oxoaniones en grupo
  4. Nos entrenamos en grupo y jugamos con oxoaniones individualmente
  5. Evaluación: realizamos una actividad de nivel de logro de oxoaniones individualmente

¡Empezamos a informarnos!

Los oxoaniones son sustancias cargadas negativamente, que derivan de un oxoácido en el cual se ha producido la perdida de uno o varios de sus átomos de hidrógeno. El número de hidrógenos que hemos quitado será la carga negativa del oxoanión.

Por tanto, un oxoanión viene dado por la combinación de oxígeno con otro elemento (normalmente no metálico o un elemento de transición de alto estado de oxidación), pudiendo aparecer también a veces el hidrógeno

Ejemplos:

Si al oxoácido "ácido sulfúrico" le quitamos dos hidrógenos quedará

M. Serna (Dominio público)

Otros ejemplos:

M. Serna (Dominio público)

Para nombrar los oxoaniones se aceptan tres nomenclaturas. Tradicional, prefijos numerales o multiplicadores y la nomenclatura de hidrógeno. Veamos las características de cada una teniendo en cuenta que se recomienda utilizar la nomenclatura de hidrógeno en vez de la tradicional.

Trabajamos con oxoaniones

Adivina ¿qué compuesto es?

2

Observa las letras, identifica y rellena las palabras que faltan.

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Prueba individual

Realizamos la siguiente prueba y evaluamos nuestro nivel en oxoaniones (descargar en formato editable odt)

Tarea: Reflexionamos y evaluamos

Es un momento adecuado para que dediquemos unos minutos a repasar lo aprendido hasta ahora y hacer una reflexión sobre nuestro aprendizaje. 

  1. Repasamos nuestro porfolio y vemos qué nos falta o está incompleto o qué podemos ampliar.
  2. Hacemos una reflexión personal sobre nuestro aprendizaje y la ponemos en el porfolio. Algunas cuestiones que nos podemos preguntar pueden ser: 
    • ¿Qué he aprendido? ¿Soy capaz de resumirlo en unas pocas frases?
    • ¿Qué me ha sorprendido más de todo el proceso? ¿Por qué?
    • ¿He cambiado alguna idea previa? ¿Cuál?
    • ¿Qué me ha resultado más difícil? ¿Por qué? ¿Cómo lo podría superar? ¿Quién me puede ayudar?
    • ¿Qué me está gustando más? ¿A quién podría ayudar?
    • Añade cualquier otra reflexión que consideres

Creado con eXeLearning (Ventana nueva)