Matter-1 Packet Answers
1. What are the two types of matter?
Pure substances and mixtures.
2. Name the two types of mixtures and identify which type has its components
uniformly distributed throughout and which has components that are not
uniformly distributed
Homogenous mixtures are uniform (all parts of mixture are exactly the same)
Hetereogenous mixtures are not uniform (substances remain distinct even when
mixed)
3. Name the two types of pure substances:
a. Which type of matter consists of only one kind of atom?
Elements
b. Which type of matter consists of two or more different atoms chemically
bonded together?
Compounds
4. Indicate whether each of the following is a pure substance or a mixture:
a. table salt, = pure substance
e. iron, = pure substance (Fe
(NaCl ionic compound)
element)
b. sugar, = pure substance
f. steel, = mixture
(sucrose molecule =
(homogeneous; alloy of iron
C12H22O11)
and carbon)
c. fruit salad = mixture
g. air, = mixture
(heterogeneous)
(heterogeneous)
d. prepared instant coffee, =
h. oxygen, = pure substance (O2
mixture (homogeneous when
molecule)
dissolved)
5. Indicate whether each of the following is homogeneous or heterogeneous mixture:
d. Gatorade =homogeneous
a. oil and vinegar salad dressing, =
e. Blood =heterogeneous
heterogeneous
f. a bucket of ocean water =
b. mayonnaise = homogeneous
heterogeneous (but salt solution is
c. brass (a metal alloy)
homogeneous)
=homogeneous
6. Classify the following materials as elements, compounds, or mixtures:
iodine, = element
mercury, = element
brass, = alloy (mixture of metals)
distilled water, = compound (H2O)
tap water, = mixture
cigarette tobacco, = mixture
propane gas, = compound (C3H8)
dry ice, = compound (CO2)
diamond, = element (C)
sucrose (sugar) = compound
bronze metal = alloy (mixture of metals
7. Fill in the table with a check appropriately identifying each of the substances below as
pure substances or mixtures, then classifying them further as either elements, compounds,
homogeneous mixtures, or heterogeneous mixtures:
Substance
sodium
chloride
Apple
Plutonium
carbon
monoxide
acid rain
Calcium
Smog
Paint
Ammonia
calcium
sulfide
Gold
chicken soup
Milk
Blood
Air
Methanol
Tantalum
Argon
iced tea
Silver
orange juice
sodium
bicarbonate
Ammonium
chloride
spaghetti
sauce
Methane
Pure
Substance
X
Element
X
X
X
X
X
Compound
Mixture
Homogeneous
Mixture
X
X
X
X
X
X
Possibly
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Heterogeneous
Mixture
X
X
X
X
X
X
X
Antimony
atmosphere
carbon
dioxide
Chili
sulfuric acid
X
X
X
X
X
X
X
X
X
X
8. Can all pure substances be separated? Explain. If yes, list ways to separate them.
Not by physical methods, but compounds can be separated by chemical reactions.
Elements cannot be separated by any chemical or physical means.
9. Can all mixtures be separated? Explain. If yes, list ways to separate them.
Yes, all mixtures can be separated physically since the substances are not chemically
bound together and remain distinct from each other.
10. Physical Separation Techniques – list and describe four methods:
a. Distillation, filtering, evaporation, decanting, centrifugation, crystallization,
chromotagraphy and even simply picking out different pieces!
11. A mixture of sand and table salt can be separated by filtration because the substances in
the mixture differ in
a. boiling point
b. density at STP
c. freezing point
d. solubility in water
12. What type of separation can be done using the equipment shown below? Give an example
of a mixture that could be separated by this process.
a. Filtering. Could separate out a precipitate like AgCl from the surrounding
solution.