Chemistry Chapter 1

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Chemistry Chapter 1

• Matter and Change

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I. What is Chem

• Chem
• Chemical
• Quantitative
• Qualitative

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-Branches of Chem 1. Organic 2. Inorganic 3.
Physical 4. Biochemistry 5. Analytical Chem
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-Scientific Method 1. State the Problem 2.
Gather Information 3. Form a hypothesis 4. Test
the hypothesis 5. Record and Analyze Results 6.
Conclusion
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-Sci. Method Hypoth Law Theory
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II. Matter and Its Properties

• -Matter has mass occ space
• 1. Occupy space
• 2. Experience inertia
• Inertia resist change

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weight (mass)(gravity) mass amount of
matter Law of Conservation of Mass
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-NRG ability to do work ability to create a
force over a distance some time in the
future Chem deals mostly with 1. Thermal 2.
Radiant 3. Electric
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kinetic nrg (.5)(m)(v)2 nrg of
motion potential nrg (m)(g)(h) nrg do to
position
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-Law of Conservation of NRG (1st) -States of
Matter 1. Solid 2. Liquid 3. Gas 4.
Plasma See Website Exs http//www.chem.purd
ue.edu/gchelp/liquids/character.html
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-Properties Changes can be used to classify
subst 1. Physical observ or measure
without alter ident of the
material. ex color 2. Chemical change that
alters ident ex burn wood, rust iron
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Chem Rxn pg13 Reactans yields Products A B
----gt AB Exother acid HOH --gtheat
??? Endother ice heat ---gt HOH
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Indicators of Chem Rxns 1. Produce heat
light 2. Produce gas 3. Produce
precipitate K Demo precip. solid formed
from a solution
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III. Classification of Matter

• -Mixture
• Heterogeneous pg 16
• ex veg. soup, clay water
• Homogeneous / Solutions pg16
• ex air, salt HOH

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Homogeneous / Solutions pg16 ex air, salt
HOH components of any mixture can be
separated from each other by physical methods
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-Pure Substances 1. Same property 2. Same
composition 3. Can not be separated without
changing the ident ex electrolysis
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element ex K, Pb chem. Cmpndex HOH,
sugar Law of Definite Composition ex
CH4 C75 H25
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IV. Chemical Elements

• Groups vert
• Periods horz
• -Symbols

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-Types of Elements (pg21) 1. Metals 2.
Nonmetals 3. Metalloids 4. Noble Gas