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LABORATORIO DE QUÍMICA
PRACTICA NO. 11: OXIDOS METALICOS
OBJETIVO : obtener el anhídrido carbónico y comprobar algunas de sus propiedades.
SECCION: 22 CALIFICACION:______________
I.- ESCRIBE LA RESPUESTA CORRECTA A CADA PREGUNTA
1.- Investigue cuando menos tres propiedades del CO 2
2.-Enuncie dos usos comerciales del CO 2
-Refrescos embotellados
- Extinguidores
3.- Proporcione dos reacciones de obtención del CO 2
Ca CO 3 + 2 HCl ____________ Ca Cl 2 + H 2 O + CO 2
Na H CO 3 + HCl ____________ Na Cl + H 2 O + CO 2
4.-Mencione dos propiedades químicas importantes del CO 2
El dióxido de carbono es una sustancia estable bajo condiciones ordinarias no permite la combustión de sustancias que son combustiones comunes.
5.- Investigue la importancia del CO 2 en la naturaleza.
Produce la fotosíntesis del cual nosotros vamos a obtener oxigeno y alimentos. El dióxido de carbono vuelve a la naturaleza como consecuencia de la respiración.
6.- Dibuje los tubos de ensayo en el momento en que se desprende el CO 2 en ambas reacciones.
1 era Reaccion
5 gr. de Ca CO 3 HCl (50%)
Ca CO 3 + 2HCl __________ Ca Cl 2 + H 2 O+ CO 2
2 da Reaccion
1 gr. de Na H CO 3 3ml. de HCl(50%) CO 2
Na Cl + H 2 O
Na HCO 3 + HCl _______ Na Cl + H 2 O + CO 2
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Enviado por: Auri Idioma: castellanoPaís: México