Properties of Matter – Ch. 2
Learning Targets:
E4. Describe an application of the Law of
Conservation of Matter.
E6. Compare the physical and chemical
characteristics of elements.
1. Fill in the chart
2. Fill in the blanks:
SUBSTANCES – have a _____________________________
composition
Properties of Elements •
Elements consist of _________________ and _____________
be decomposed into simpler substances.
Properties of Compounds •
The relative proportions of the _________ in
a compound are __________. •
The components of a compound _________ retain the ________________
of their elements. Both sodium and chlorine are poisonous; their
compound, table salt - NaCl - is absolutely
essential to life. •
It takes ________________ to separate the
components of a compound. Components are separated ______________.
MIXTURES – _______________________
of two or more substances
Properties of Mixtures •
The composition of a mixture is__________. •
Each of its components _______________________
___________________________________________. •
Its components are ___________ separated ___________.
3. Which are mixtures
and which are substances? (Mark each with an “M” or an “S”)
distilled water wood air
brass sandstone aluminum
soil graphite cotton
sea water paint pyrite
leaf blood iron
gold homogenized milk lemonade
4. What are some examples of physical properties that could help separate
the components of a mixture?
5. What are some examples of processes by which the components of a mixture can be
separated?
6. Define physical change.
7. Define chemical change.
8. Write the name
of the process for each of the following phases changes and give an example of
each.
a. solid à liquid
b. liquid à solid
c. liquid à gas
d. gas à liquid
e. gas à solid
f. solid à gas
9. Give four more examples of physical changes.
1.
2. mechanical changes:
a.
b.
c. etc.
10. Give 5 types of evidence for a chemical
change.
1.
2.
3.
4.
5.
11. Fill in the blanks: An _______________ reaction gives off
heat into its surroundings so the surroundings become ____________. An ______________ reaction takes heat
from its surroundings so the surroundings become_____________.
12. For each of the following demonstrations
performed by your teacher, write down what evidence you observed that shows a
chemical change took place. For
reactions that involve an energy change, classify them as endothermic or exothermic.
#1 – heating
magnesium
#2 – mixing a
colorless solution of calcium chloride & sodium carbonate
#3 – mixing a pale
yellow solution of iron chloride and a colorless solution of potassium thiocyanate
#4 – mixing solid
magnesium and a solution of hydrochloric acid
#5 – mixing a
hydrochloric acid solution with a sodium hydroxide solution
#6 - mixing solid
barium hydroxide and solid ammonium chloride