Question:

Density (g/cm Substance Identifying an Unknown Moterial by its Physical Properties Melting Point (c) 2.17 Mass (9) Color 801 Tab

Density (g/cm
Substance
Identifying an Unknown Moterial by its Physical Properties
Melting Point (c)
2.17
Mass (9)
Color
801
Table salt
14.5
white
1.53
148
Sugar
11.5
white
2.16
Baking soda
50
16.0
white
2.17
Unknown
801
white
16.0
LAB Manager
Skill Practice: How can you
calculate density? SC.8.P.8.3
Physical Lab: Identifying
Unknown Minerals
LAFS.68.WHST.1.2. LAFS.8.SL.1.1,
SC.8.N.1.1, SC.8.N.1.5, SC.8.P.8.3,
SC.8.P.8.4
Identifying Matter Using Physical
Properties
Physical properties are useful for describing types of matter, but
they are also useful for identifying unknown substances. For
example, look at the substances in the table above. Notice how their
physical properties are alike and how they are different. How can
you use these properties to identify the unknown substance?
You cannot identify the unknown substance by its color. All of
the substances are white. You also cannot identify the unknown
substance by its mass or volume. Mass and volume are properties
of matter that change with the amount of the sample present.
m Photography/Digital
NGSSS Check
Metal
Density
(g/cm”)
2.70
Aluminum
Zinc
713
Recall that melting point and density are properties of matter
that do not depend on the size or the amount of the sample.
Therefore, melting point and density are more reliable for
identifying an unknown substance. Notice that both the melting
point and the density of the unknown substance match those of
table salt. The unknown substance must be table salt.
Iron
7.87
Copper
8.96
6. Use the table above to
determine the identity
of a substance with a
mass of 108 g and a
volume of 40 cm.
SC.8.P.8.3
When you identify matter using physical properties, consider
how the properties are alike and how they are different from
known types of matter. It is important that the physical properties
you use to identify an unknown type of matter are properties that
do not change for any sample size. A cup of salt and a spoonful of
salt will have the same melting point and density even though the
mass and volume for each will be different. Therefore, melting
point and density are physical properties that are reliable when
identifying an unknown substance.
a

Density (g/cm Substance Identifying an Unknown Moterial by its Physical Properties Melting Point (c) 2.17 Mass (9) Color 801 Table salt 14.5 white 1.53 148 Sugar 11.5 white 2.16 Baking soda 50 16.0 white 2.17 Unknown 801 white 16.0 LAB Manager Skill Practice: How can you calculate density? SC.8.P.8.3 Physical Lab: Identifying Unknown Minerals LAFS.68.WHST.1.2. LAFS.8.SL.1.1, SC.8.N.1.1, SC.8.N.1.5, SC.8.P.8.3, SC.8.P.8.4 Identifying Matter Using Physical Properties Physical properties are useful for describing types of matter, but they are also useful for identifying unknown substances. For example, look at the substances in the table above. Notice how their physical properties are alike and how they are different. How can you use these properties to identify the unknown substance? You cannot identify the unknown substance by its color. All of the substances are white. You also cannot identify the unknown substance by its mass or volume. Mass and volume are properties of matter that change with the amount of the sample present. m Photography/Digital NGSSS Check Metal Density (g/cm”) 2.70 Aluminum Zinc 713 Recall that melting point and density are properties of matter that do not depend on the size or the amount of the sample. Therefore, melting point and density are more reliable for identifying an unknown substance. Notice that both the melting point and the density of the unknown substance match those of table salt. The unknown substance must be table salt. Iron 7.87 Copper 8.96 6. Use the table above to determine the identity of a substance with a mass of 108 g and a volume of 40 cm. SC.8.P.8.3 When you identify matter using physical properties, consider how the properties are alike and how they are different from known types of matter. It is important that the physical properties you use to identify an unknown type of matter are properties that do not change for any sample size. A cup of salt and a spoonful of salt will have the same melting point and density even though the mass and volume for each will be different. Therefore, melting point and density are physical properties that are reliable when identifying an unknown substance. a