Chapter Nine
Unit D
Chemical
Compounds
Lesson 1
What are compounds?
Vocabulary Words
 Chemical
formula Chemical reaction-
Standards
 Students
know during chemical reactions
the atoms in the reactants rearrange to form
products with different properties.
Compounds


Compounds can be found
in nature

H20 water

CO2 carbon dioxide
Compounds can be made
in a laboratory by a
chemical reaction

Fe & S when heated
create = FeS (pg. 327)

chemical formula: used to
describe a compound

Fe2O3 rust

CaCO3 limestone

NaCl salt

C6H12O6 sugar

SiO2 glass
Chemical Reactions
Chemical Formulas

Chemical Formula of:

water H2O

Sugar C6H12O6
Lesson 2
What are some
properties of compounds?
Vocabulary Words







Boiling pointMelting pointChemical propertyPhysical propertyConductivitySolubilityDensity-
Standards
 Students
know differences in chemical and
physical properties of substances are used to
separate mixtures and identify compounds.
Physical Properties
ways to describe matter






Mass- How much does
it weigh?
Volume- How much
space does it take up?
Density- Is it hollow?
Size- How big or small
is it?
Color- What color is it?
Melting Point- Can it go
from a solid to liquid?




Boiling Point- Can it go
from a liquid to gas?
Odor- What does it smell
like?
Length- How long is it?
Solubility- Can it dissolve in
water?


Ex: sugar & water
Conductivity- Can it conduct
electricity?

Ex: rubber vs metal
Solubility & Conductivity
Chemical Properties

Material changing
chemically



Ex. Burning
Paper & fire = chemical
change
Paper changes to ash
Lesson 3
What are acids, bases,
and salts?
Vocabulary Words
 Acid Base pH Salt Indicator-
Standards
 Students
know the common properties of
salts, such as sodium chloride (NaCl).
Base



Receives hydrogen ions
(atoms)
pH scale value greater
than 7
Properties:


Tastes bitter
Examples:

Soap, baking soda,
cement, potato,
banana, water,
spinach, carrots
Acid



Releases hydrogen ions
(atoms)
pH scale value less than 7
Properties:


Tastes sour
Examples:

vinegar, stomach
acid, soda, meat,
coffee, candy,
peanuts, oranges,
orange juice
Salt

Compound made of
nonmetal and metal

NaCl: table salt

CaCl2 put on icy roads


Sea Salt: combination of
72 elements
Salts are:

Hard, brittle, low melting
point, dissolves in water