Download Unit 01 Qual Chem

Chapters 1 & 2
Topics: Matter, Physical & Chemical Properties,
Measurements, Sig Figs, etc
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By the end of this lesson, I can…
◦ Classify something as matter or energy
◦ Identify whether a physical or chemical change has
occurred
◦ Classify a symbol as a mixture, atom, molecule, or
compound
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Chemistry = the study of composition,
structure, and properties of substances and
the changes that they undergo

Matter= anything that has mass (made of
atoms) and takes up space
◦ Resistant to change in motion; has weight
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Are ya with me? List 3 examples of matter
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Energy = the ability to cause change or to do
work
2 types of NRG:
◦ Kinetic = energy of an object in motion
◦ Potential = energy of an object at rest

Are ya with me? List 2 forms of NRG
associated with chemistry.

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Law of Conservation of Matter = matter can
neither be created nor destroyed
Law of Conservation of Energy = energy can
neither be created nor destroyed. Only
transferred.
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Solid = definite shape and volume
Liquid = definite volume, takes the shape of
its container, and has the ability to flow
Gas = indefinite shape and volume
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Physical Change = a change that does not
alter the identity of a substance (shape, size,
state)
Chemical Change = a change in which one or
more substances are converted into
substances with different chemical properties
Color Change
Production of a gas (bubbles)
NRG transfer
1.
2.
3.
◦
◦
Formation of a precipitate
4.
◦
5.
Exothermic= NRG is released, feels warm
Endothermic = NRG is absorbed, feels
cold
A cloudy solid formed from two clear
liquids
Change in odor
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Pure Substances – Only one type of matter is
present
Mixtures- More than one type of matter is
present but each kind retains its own
properties. Can be separated by physical
means
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Heterogeneous = mixture that is not uniform
◦ How would you separate alphabet soup?

Homogeneous (aka “solutions”) = mixture in
which the components are evenly distributed
throughout
◦ How would you separate salt water?
◦ How would you separate salt and pepper?
◦ How would you separate pepper and sawdust?
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Atoms = building blocks of matter
Elements = composed of only one type of
atom (Periodic Table of Elements)
◦ Metals
◦ Nonmetals
◦ Metalloids
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Compounds = two or more DIFFERENT atoms
combine to form one substance
◦ Cannot be separated by physical means

Molecules = two or more SAME atoms
combine to form one substance
◦ Cannot be separated by physical means
◦ 7 Diatomic: “diatomic” = 2 atoms
 Ex. HONClBrIF