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Summary

Sumario Resumen de exámen de química sobre materia, reacctivos y átomos

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Resumen, esquema visual de un examen de química sobre átomos, una parte de la tabla periódica, y muchos más temas, además contiene enlaces para mejor comprensión

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• compuestos (átomos compuestos--> FORMAS DE EXPRESAR
SUSTANCIA (propiedades características) H2O, CO2) LA CONCENTRACIÓN
1 MOL de C
• elementos (átomos aislados--> O2, He)

MOL: El núm
MATERIA en unidades
en gramos

• Homogéneas (disolución)--> Calentamiento a sequedad, Destilación
1 átomo de
MEZCLAS
1 mol de á

• Heterogéneas (se distinguen componentes)--> Filtración,
*Ar=masa at
Decantación
*Mr=masa m
Cambios físicos: sustancian no cambian, se
pueden volver a recuperar

Cambios químicos: se crea una nueva sustancia



*La masa siempre se conserva aunque el
volumen no




REACTIVOS
1ª Ley de la conservación de la masa
Reacciones químicas: A+B --> C+D (Lavoisier)

-> Las reacciones se producen mediante
choques con suficiente energía y con
2ª Ley de las proporciones definidas
orientación adecuada.
(Proust)




Mreactivos-->Mproductos



AJUSTAR REACCIONES

• Coeficientes estequiométricos

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Secondary school
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ESO
Course
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4

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Uploaded on
September 1, 2023
Number of pages
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Written in
2023/2024
Type
SUMMARY

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