L.T: I can observe and distinguish between different
mixtures.
Journal Entry:
Observe the demo of mixing
a) Baking Soda (NaHCO3) with Water (H2O) and
b) Baking Soda and Vinegar (CH3COOH).
In a paragraph:
1- Give Qualitative Observations for each demo
2- Which combination created a chemical change? Explain
3- Which combination was only a physical change?.Explain
L.T: I can observe and distinguish between different
mixtures.
Mixture: two or more different materials, substances or
objects mixed together without causing a chemical
change. (no new molecules formed)
Next >
L.T: I can observe and distinguish between different
mixtures.
In a mixture, the molecules of the
different things do NOT combine!
L.T: I can observe and distinguish between different
mixtures.
Heterogeneous
Homogeneous
(Het-er-o-jean-us) Mixture
(Homo-jean-us) Mixture
(“Different”)
(“Same”)
Mixtures
Mixture that looks
Mixture that looks the
different. (You can see the same. (You can NOT really
different ingredients)
see the different
ingredients)
Inquiry: What are mixtures?
Conductor of heat and
electricity
Magnetic/non-magnetic
Color
Size and Shape
State of Matter
(boiling, melting,
freezing point)
Physical properties describe many differences
between things.
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Mixtures
Other times it is more difficult to see what is in
a mixture, like with the air we breathe.
Air is a mixture of mostly nitrogen (N), oxygen(O)
carbon dioxide (CO2).
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Inquiry: What are mixtures?
Dissolving salt in water:
It’s hard to tell whether a new substance forms when salt
dissolves in water.
What type of mixture is this? Why?
Homogeneous Mixture
Everything in the mixture
looks the same.
Heterogeneous Mixture
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Inquiry: What are mixtures?
Rocks are also examples of mixtures.
They are mixtures of different minerals.
Are these rocks homogeneous or heterogeneous mixtures?
Heterogeneous Mixtures. We can see the different parts
Inquiry: What are mixtures?
Solutions
Solutions: A mixture when one substance dissolves
into another substance.
Solubility: The ability of
something to dissolve.
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Inquiry: What are mixtures?
Soluble
Sugar is
soluble
Salt is
soluble
Both sugar and salt are soluble in water.
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Inquiry: What are mixtures?
Soluble and Insoluble
A sugar
solution
tastes sweet
You will not be able to
see the sugar or salt in
a solution …
… but you will be able
to taste the difference!
A salt
solution
tastes salty
Taste is a physical
property and does
not change.
Next >
Soluble and Insoluble
Soluble: something that
WILL dissolve.
Salt
Insoluble: something that
will NOT dissolve.
Next >
Complete the Venn diagram using the examples below.
a) Chocolate Milk
b) Cereal and Milk
c) Peanut butter and Jelly
d) Ice cream with sprinkles
e) Mac and cheese
f) Air
g) Soda
Heterog.Mix
Homog.Mix
L.T: I can review the different types of matter
Elements: Types of atoms
Br
Element and Atom
Vs.
Br
Br
Element and Molecule
L.T: I can review the different types of matter
Chemical Vs. Physical
Mixture:
Compound:
Different substances physically
different atoms bonded together Put together. (NO new molecules)
H
Heterogenous
Homogeneous:
Vs.
looks diff.
looks the same
Cl
Br
O
Solution: made
when something
dissolves into
something else
L.T: I can review the different types of matter
Homogeneous Mixture
Solution
Salt
L.T: I can review the different types of matter
Pure substance vs.
Mixture
Mixture:
Pure substance:
Different substances physically
Substance that is NOT a mixture Put together. (NO new molecules)
Heterogenous
Homogeneous:
Vs.
looks diff.
looks the same
Solution: made
when something
dissolves into
something else
L.T: I can review the different types of matter.
Substance Heterog. Homog. Pure
Mix
Mix
Sub.
Lead
Metal
(Pb)
Table Salt
(NaCl)
Kool-Aid
Drink
Vegetable
Soup
Oxygen
Gas(O2)
Distilled
Water
Solution Elem. Comp
.
Mix.
L.T: I can review the different types of matter.
Substance Heterog. Homog. Pure
Mix
Mix
Sub.
Concrete
Pure
Gold (Au)
Brass
Met.
(Alloy)
Flat 7-up
Soda
Raw egg
(cracked)
Air
Solution Elem. Comp
.
Mix.
L.T: I can review the different types of matter.
Substance Heterog. Homog. Pure
Mix
Mix
Sub.
Pure Iron
(Fe)
Iron Rust
(Fe2O3)
Soil
Baking
Soda
(NaHCO3)
Solution Elem. Comp
.
Mix.
Inquiry: How can different mixtures be separated?
Journal Entry
1) Draw a CO molecule
C
O
The 2 different elements are
connected, creating a compound.
The chemical formula CO
tells us that the atoms are connected.
Vs.
2) Draw C and O atoms
C
O
The 2 different elements are
NOT connected.
They are just separate atoms.
Inquiry: How can different mixtures be separated?
In a mixture, the molecules of the
different things do NOT combine!
PURE SUBSTANCE
(only H2O molecules)
MIXTURE
(combination of water and
sugar molecules that are not bonded
Inquiry: How can different mixtures be separated?
Mixture
Pure Substance
with compounds
Pure Substance
with elements
Inquiry: How can different mixtures be separated?
Separating Mixtures
Colander
Sieve
Sifting:
using a sieve or colander to separate a mixture
based on size.
Next >
Inquiry: How can different mixtures be separated?
Sifting
When the sand and pebbles are separated, they are
the same size and color as they were before they
were mixed.
Next >
Inquiry: How can different mixtures be separated?
Inquiry: How can different mixtures be separated?
Sulfur and Iron Filings
Sulfur and iron filings is a
mixture too.
Sulfur
Iron filings
You could use a
physical property of
iron filings and of sulfur
to separate them.
Can you think of one?
Next >
Inquiry: How can different mixtures be separated?
Sulfur and Iron Filings
Magnetism!
If you move a magnet
close to the mixture,
it will attract the iron
filings.
The sulfur powder will
remain in a pile
because it is not
magnetic.
Magnetic
Non-magnetic
Next >
Inquiry: How can different mixtures be
separated?
Sulfur and Iron Filings
Iron filings are magnetic.
They maintain their magnetic property in the mixture.
Iron and sulfur can be separated without breaking bonds.
Next >
Inquiry: How can different mixtures be
separated?
If you heated this mixture of iron and sulfur a chemical reaction
(chemical change) would occur producing iron sulfide.
heat
Fe (s) + S (s)  FeS
Iron and Sulfur mixture
Hot Plate
Inquiry: How can different mixtures be
separated?
How can we separate a homogeneous mixture solution of salt and
water?
Topics for quiz tomorrow
1) Vocabulary (Malleable, Ductile, Luster, Conductor, Insulator,
Electricity, Ore, Alloy, Mixture, Heterogeneous Mix,
Homogeneous Mix., Solution, Solubility, Soluble, Insoluble,
Physical Change, Chemical Change, Reactants, Products, Fusion,
Chemical Bond)
2) Metals vs. Non-Metals
3) Physical vs Chemical properties/changes
4) Homogeneous mix. Vs. Heterog. Mixture vs. Pure substance vs
Element vs. Compound. Vs. Solution