-- Elements Compounds --- And Mixtures --
Name
Date
Period
Directions
 There are 16 stations, at each station there is a sample with a tag.
 Copy the info from the tag.
 You may look, touch and smell all of the samples.
 No tasting.
#
1
2
3
4
5
6
7
8
9
Name of
substance
Symbol or
formula
Brief description of
PHYSCIAL PROPERTIES
E, C, M?
#
Name of
substance
Symbol or
formula
Brief description of
PHYSCIAL PROPERTIES
E, C, M?
10
11
12
13
14
15
16
1. How can you classify matter into elements, compounds or mixtures with only the
information on the tags.
2. Gold, magnesium, copper, zinc and iron are all metals. What properties do they share
that would make us classify them all together as metals?
3. Alka-Seltzer is a mixture of three compounds on our list. Aspirin is a white powdery
pain reliever. Baking soda is a white, bitter tasting powder that helps with upset
stomach. Citric acid is a white, very sour tasting powder. Since Alka-Seltzer is a
mixture of these compounds, predict what the chemical properties of Alka-Seltzer are.
4. Sugar and rubbing alcohol are both compounds made of the same elements
(Hydrogen, carbon and oxygen). Are they more similar to or different from each other?
Give examples.
5. Aricanite is a mixture of Fe and S. Is aricanite similar to Fe and S or different from Fe
and S, and why? Give examples.
6. Pyrite is a compound of Fe and S. Is pyrite similar to Fe and S or different from Fe
and S and why? Give examples.
-- ECM -1
Gold
Au
E
9
Aspirin
C9H8O4
C
2
Magnesium
Mg
E
10
Sugar
C12H22O11
C
3
Copper
Cu
E
11
Aricanite
S and Fe
M
4
Sodium Bicarb
NaHO3
C
12
Sulfur
S
E
5
Rubbing alcohol
C3H8O
C
13
Iron
Fe
E
6
Zinc
Zn
E
14
Sand
Various
M
7
Alka-Seltzer
M
15
Citric Acid
C6H8O7
C
8
Carbon
See
Below
C
E
16
Pyrite
FeS2
C
Alka-Seltzer
10% Acetlysalicylic Acid
30% Citric Acid
60% Sodium Bicarbonate
C9H8O4
C6H8O7
NaHO3
#1 Gold
#2 Magnesium
Au
Mg
#3 Copper
#4 Sodium Bicarbonate
Cu
NaHO3
#5 Rubbing Alcohol
#6 Zinc
C3H8O
Zn
#7 Alka-Seltzer
#8 Carbon
10%
30%
60%
C9H8O4
C6H8O7
NaHO3
C
#9 Aspirin
#10 Sugar
C9H8O4
C12H22O11
#11 Aricanite
#12 Sulfur
50% Fe
50% S
S
#13 Iron
Fe
#14 Sand
SiO2
KAlSiO8
CaCO3
(Quartz)
(Feldspar)
(Calcite)
#15 Citric Acid
#16 Pyrite
C6H8O7
FeS2
METAL
 Hard
 Dense
Malleable
 Shiny
 Solids
 Conductors
 Malleable
PHYSICAL
white, powdery, solid
Sodium
Bicarb
Citric
Acid
The CHEMICAL properties are
more interesting.
Aspirin is a PAIN RELIEVER.
Baking soda tastes BITTER
Citric Acid tastes SOUR
Aspirin
Alcohol
Sugar
Liquid
Clear
Bad smell
Taste bad
Poison
crystalline solid
White
Sweet smell
taste good
food
Sugar
Alcohol
Even though both Alcohol & Sugar are
compounds made with the same
elements (C,H,O) their properties are
very different
Pyrite
Iron
Sulfur
Solid
Hard
Brittle
Very shiny
Golden
No smell
Not mag.
solid
hard
malleable
little shiny
black
no smell
magnetic
solid (that’s about it!)
soft
crumbly
not shiny
yellow
Stinky!
not magnetic
The properties of pyrite are NOT a mixtures of the
properties of Fe & S.
When they form a compound, the properties are very
different!
FeS2
Fe
S
This lab was all about seeing how properties change based on if it is an element,
compound or mixture.
By reading the tags in the lab, we can see which are elements. Elements are
listed with a CHEMICAL SYMBOL. There are all one or two letters, and they are
all listed on the Periodic Table, like gold (AU). Compounds are listed with a
CHEMICAL FORMULA which has several chemical symbols, and often numbers
as well, such as sugar (C12H22O11). A Mixture will need to be described with a
list of INGREDIENTS.
Iron, gold, magnesium, copper and zinc are all hard, shiny, rather dense solids
that all conduct electricity. These properties classify these elements as
METALS.
Alka-Seltzer is made of Aspirin, Citric Acid and Sodium Bicarbonate (Baking
Soda). Comparing the physical properties of Akla-Seltzer with the properties of
its ingredients is easy. All 3 are white powders, and when put together, make…
GASP! A white powder.
The CHEMICAL properties are more interesting.
Asprin is a PAIN RELIEVER.
Baking soda tastes BITTER
Citric Acid tastes SOUR
When baking soda and acid, together, get wet, they FIZZ.
Alka-Seltzer’s chemical properties are a MIXRURE of the properties of the
ingredients. There are no new properties!!!!!!
It is a pain reliever, that has a bitter & sour taste that fizzes when it gets wet.
Rubbing alcohol and sugar are both made of carbon, hydrogen and oxygen. The
SAME THREE ELEMENTS. But, they are put together differently, so they have
DIFFERENT PROPERTIES.
Rubbing alcohol is a clear liquid that has a strong smell, evaporates quickly, and
is very toxic if you drink it.
Sugar is a white solid that tastes good!
Even though they are both made with C, H and O, the properties of alcohol and
sugar are VERRY DIFFERENT!!!!!!!!!!!!
Pyrite is a COMPOUND of iron and sulfur. Since these elements are in a
compound, I can expect the properties of pyrite to be different then Iron or sulfur.
Pyrite is shiny, almost gold color, and forms crystals. It is brittle, and will shatter
like glass.
Iron can be shiny, but not when it is found in nature (it is always rusty) but pyrite
IS shiny. Iron is hard, if you hit it, it will bend, and not shatter, but pyrite WILL
SHATTER. Iron IS magnetic. Pyrite is not.
Sulfur is a lemony yellow color, and iron is black. Pyrite is a gold color (not little
bits of black and yellow)
THE PROPERTIES OF PYRITE ARE NOT A COMBINATION OF THE
PROPERTIES OF IRON AND SULFUR. THE PEOPERTIES OF PYRITE ARE
NOTHING LIKE THE PROPERTIES OF THE ELEMENTS THAT MAKE PYRITE.
Aricanite however is a MIXTURE of iron and sulfur, and since it is a mixture,
Aricanite DOES have the properties of iron and sulfur. The little yellow bits are
still yellow like sulfur and still stinky like sulfur. The black bits are still black like
the iron, and still magnetic like the iron. THERE ARE NO NEW PROPERTIES
HERE!