Important Vocabulary
Words for Mixtures and
Solutions
Solubility
We say a substance dissolves if it spreads
apart when added to a solvent (like water)
so we can’t crystals/grains anymore
Dissolving is a complex physical and
chemical process!
The substance is still there! We just can’t
see it because it has spread apart.
Question: How is dissolving different from
melting?
Solubility
A substance is soluble if it dissolves in
water.
Example: We observed in class that table
salt (sodium chloride) is soluble in water.
After adding it to water, it spreads apart so
we can no longer see it!
Insoluble
A substance is insoluble if it will NOT
dissolve in water.
Example: We observed in class that zinc
oxide is insoluble in water. After adding it
to water, we can still see the zinc oxide...it
doesn’t “go” anywhere!
Solutions
A solvent is the “larger part” of a solution.
Usually, the solvent is a liquid.
=
+
SOLUTE
SOLVENT
SOLUTION
Solutions
A solute is the “smaller part” of a solution.
Usually the solute is a solid.
=
+
SOLUTE
SOLVENT
SOLUTION
Solutions
When a solute and a solvent are mixed
together, this forms a solution.
=
+
SOLUTE
SOLVENT
SOLUTION
Types of Mixtures
Mountain Dew
When a solute dissolves in
a solvent to make a solution,
this is called a
HOMOGENEOUS MIXTURE.
You cannot see any “separate
parts” because it is all mixed
together thoroughly.
What homogeneous mixtures can
you think of?
Types of Mixtures
Sulfur and iron
The other type of mixture is
a HETEROGENEOUS
MIXTURE. With a
heterogeneous mixture,
you can see the different
“parts” of the mixture.
What heterogeneous
mixtures can you think of?
FLASH CARDS
You will be making flash cards to help you learn
today’s vocabulary!
Each flash card should contain the following:


The vocabulary word on one side
The definition and a picture on the other side
Example of a flash card:
PURE
SUBSTANCE
FRONT
BACK
A substance that is
made of only one
thing/substance
FLASH CARDS
Each flash card should contain the following:


The vocabulary word on one side
The definition and a picture on the other side
Make flash cards of the following vocabulary
words:
 Solute
Solvent
Solution
 Soluble
Insoluble
 Saturated
Solubility
*We have not learned these words yet! You will record pictures and
definitions for them later.
DIGI Question: Mixtures and
Solutions
In this scenario,
what is the:
A) solvent
B) solute
C) solution
Sugar is added to water
in this bird feeder to
create a sweet treat for
hummingbirds!