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Classification of Matter
Part 1: Classifying Matter
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Everything in the universe is made of matter.
Matter is made of tiny particles called atoms.
All the matter around us is
classified in two major
groups…
What Is Matter?
Matter is anything that
has mass and volume.
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Matter
Have a fixed
composition;
made of 1 type
Have a variable
composition; made of many types
Mixtures Pure Substances
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Pure substances have a fixed composition.
Pure Substances
The composition doesn’t change, no matter
what part of the substance you look at!
Same composition
Same composition
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Mixtures do not have a fixed composition.
Mixtures
The composition of mixtures changes, depending on what part you look at!
Different composition
Different composition
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A
Pure Substance or Mixture?
Pure Substance
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B
Pure Substance or Mixture?
Mixture
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C
Pure Substance or Mixture?
Pure Substance
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D
Pure Substance or Mixture?
Pure Substance
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E
Pure Substance or Mixture?
Mixture
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F
Pure Substance or Mixture?
Pure Substance
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H
Pure Substance or Mixture?
Mixture
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A mixture is made of 2 or more types of atoms
that are NOT chemically combined together.
Mixtures can take many forms:
2+ Solids 2+ Gases
Looking Closer At Mixtures
2+ Liquids
ANY combination of solids, liquids & gases
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Mixtures of Solids
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Mixtures of Liquids
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Mixtures of Gases
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Types Of Mixtures
There are 2 major types of mixtures:
Heterogeneous Homogeneous
You can see the
different parts
(phases) of the
mixture easily
Means “different” Means “the same”
You cannot see
the different parts
(phases) of the
mixture
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Heterogeneous Mixtures
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Homogeneous Mixtures
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Which Kind of Mixture?
Classify each type of mixture as:
Heterogeneous Homogeneous
Heterogeneous Heterogeneous Homogeneous
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Classification of Matter
Part 2: Solutions, Suspensions, Colloids
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A solution is a special type of mixture.
Solutions
A solution is a homogeneous mixture
that combines a solute and a solvent.
A solution involves one
substance dissolving in
another substance, which
is usually a liquid.
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A solution is a special type of mixture.
Solutions
A solution is a homogeneous mixture
that combines a solute and a solvent.
The solid part that
gets dissolved.
e.g. salt, sugar
The liquid part that
does the dissolving.
e.g. water
Solute Solvent
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How To Make A Solution
Solute Solvent Solution + =
Salt Water Salt Solution
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We can measure how easily a solute
will dissolve in a certain solvent.
Solubility
This measurement is called solubility.
The solute dissolves
quickly & easily
e.g. salt in water
The solute does not
dissolve easily
e.g. sand in water
HIGH Solubility LOW Solubility
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We can add a LITTLE or a LOT of solute!
Dilute vs. Concentrated
For example, putting spoonfuls
of sugar into a cup of tea…
A solution with a
small amount of
solute is called a
dilute solution.
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We can add a LITTLE or a LOT of solute!
Dilute vs. Concentrated
For example, putting spoonfuls
of sugar into a cup of tea…
A solution with a
large amount of
solute is called
concentrated.
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Eventually, a solvent can’t hold anymore!
Saturated Solutions
A saturated solution CANNOT hold any
more solute at a certain temperature.
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But, by heating a solvent up, we can make
it hold even more solute than normal.
A super-saturated solution contains more
solute than it can normally dissolve.
Keep Going!
Heat It!
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Classification of Matter
Part 3: Separating Mixtures
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A mixture is made of 2 or more types of atoms
that are NOT chemically combined together.
Since the phases physically mixed, they
can be physically separated.
Recall: Mixtures
Each part of a mixture is called a phase.
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Separation Techniques
There are 5 ways to separate mixtures:
Sieving
Evaporation
Distillation
Chromatography
Filtration
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Chromatography
All the chemicals are dissolved in a solvent.
Some are more soluble than others…
You need chromatography
paper and a solvent.
Separates liquid chemicals that are mixed
together in one solution.
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Drop of the ink
mixture is put
near bottom
water/alcohol
Chromatography
chromatography
paper strip
solvent
More soluble
pigments are
carried higher
Less soluble
pigments stay
lower
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Sieving
Separates different sized/shaped solids.
Smaller solids will pass through the sieve.
Larger solids will be left inside the sieve.
You can do it by
hand or with a sieve.
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Filtration
Separates solids mixed with liquids.
The liquid that passes through is the filtrate.
Solids that gets stuck in the filter is residue.
You need a funnel
and filter paper.
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Filtration
Insoluble
in water
Soluble
in water
residue
filtrate
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Evaporation
Separates solids dissolved fully in a liquid.
The liquid will evaporate into the air.
The solid residue will remain behind.
You need an
evaporation dish
and heat source.
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left behind
Evaporation
evaporates
liquid
residue
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Distillation
The liquid evaporates and is collected.
The solid residue will remain in the flask.
You need a
distillation apparatus.
Separates a solid dissolved in a liquid,
but you want to keep the liquid instead!
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Distillation
condenser
flask
flask
burner
cools down the gas
gas drips
out here
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Any Questions?