I can identify chemical and physical changes based on chemical equations.

1
OBJECTIVES Chem10 IC24
DO NOW

• I can identify chemical and physical changes
  based on chemical equations.
• I can identify chemical and physical changes
  based on particle diagrams.
• Puedo identificar cambios químicos y físicos
  basados ??en las ecuaciones químicas.
• Puedo identificar cambios químicos y físicos
  basados ??en diagramas de partículas.

• Summarize the difference between a chemical and a
  physical property
• Resumir la diferencia entre un producto químico y
  una propiedad física

2
AGENDA

• Do Now/Objectives
• Mix of Lecture
• Guided Practice
• Independent Practice
• Wrap-up

3
Observe Now Yummy Candy
Put this table in your notes!!! Ponga esta tabla
en sus notas!
Physical properties of sugar (azucar) Observations during heating observaciones durante el calentamiento Physical properties of Candy (caramelo)
- white
4
What actually happened?lo que realmente ocurrió

• C12H22O11(s)? C12H22O11(l) yummy!
• What kind of change?
• Physical/fisica
• C12H22O11(s)? 12 C(s) 11 H2O(l) really nasty!
• What kind of change?
• Chemical/quimica
• H2O(l) ? H2O(g)
• What kind of change?
• Physical/fisica

5
Physical vs. chemical CHANGES
PHYSICAL CHANGE CHEMICAL CHANGE
A change which alters a substance without changing its composition (what it is made of). Un cambio que altera una sustancia sin cambiar su composición (lo que está hecho de). A change that causes the creation of new substances. Un cambio que provoca la creación de nuevas sustancias.
6
Physical Changes Cambios Fisicas

• Aq aqueous
• Something dissolves in water
• Examples Kool-Aid Lemonade
• Aqueous solutions are HOMOGENEOUS MIXTURES

Chemical Notation (s) ? (l) ? (g) (s) ? (aq)
Examples Ejemplos Phase Changes H2O (l) ? H2O (g) Physical breaking tearing aluminum foil Dissolving or mixing NaCl (s) ? NaCl (aq)
Key Words Palabras Importantes Evaporation, condensation, boiling, melting, cutting, tearing, dissolving, mixing,
7
Chemical Changes Cambios Quimica

Chemical Notation A chemical reaction --You start with certain substances you finish with different substances --The atoms are rearranged no new elements have been created.
Examples Ejemplos C6H12O6 (s) 6O2(g) ? 6CO2(g) 6H2O(l) 4Al(s) 3Cu(SO4)2 ? 3Cu(s) 2Al2(SO4)3
Key Words Burning, combusting, replacing, reacting,
8
In your notes make this table En sus notas hacen
de esta tabla
Physical Change Chemical Change

9
Chemical or Physical Change?
Química o un cambio físico?
10
Chemical or Physical Change?
Química o un cambio físico?
11
Chemical or Physical Change?
Química o un cambio físico?
12
Chemical or Physical Change?
Química o un cambio físico?
13
Chemical or Physical Change?
Química o un cambio físico?
14
Chemical or Physical Change?
Química o un cambio físico?
15
Chemical or Physical Change?
Química o un cambio físico?
16
Density The Illusion of Bling

• Lab due Monday, September 17, 2012
• Follow the rubric to complete the lab write up IN
  YOUR LAB NOTEBOOK
• Questions?

17
Quote of the day

• Men love to wonder, and that is the seed of
  science.
• Ralph Waldo Emerson
• Thoughts?