Homework
Read Chapter 1 pages 3-7
Symbols / Names: know for quiz
Worksheet 2.2
Chapter 1 problems 2, 4, 8, 10
October 1st and 2nd Chem. Quiz
Worksheet 1: Matter and
Change
1. Biochemistry, organic, inorganic,
physical, analytical chemistry
2. Observation, hypothesis and
experiment can lead to theory.
Theory tells why. Law tells what.
3. Solid = close distance between
particles, low KE
Liquid = shape of container, own
volume medium KE
Gas = high KE, compressible
4.
a. Al
f. gold
b. N
g. mercury
c. Cu
h. oxygen
d. Mg
i. sulfur
e. Ag
j. potassium
5. Law = short statement or
mathematical equation, tells what
Theory = explain behavior, tells why
Classification of Matter
MATTER
SUBSTANCE
MIXTURE
ELEMENT
HOMOGENEOUS
COMPOUND
HETEROGENEOUS
Substance
Pure substances contain only
one kind of matter
Fixed composition with
distinct properties
Oxygen (O2), water (H2O),
sugar (C12H22O11), sodium
chloride (NaCl)
Classification of Matter
Matter
Substance
Element
Mixture
Compound
Homog.
Simplest form of matter; chemically
combines to form compounds
Heterog.
Element
Cannot be decomposed into simpler
substances
Composed of only one kind of atom
simplest form of matter under normal
lab conditions.
Building blocks for all substances
Combined chemically to form
compounds
Classification of Matter
Matter
Substance
Element
Mixture
Compound
Homog.
Can be separated into simpler
substances by chemical reaction
Heterog.
Compound
Composed of two or more elements
(contains two kinds of atoms)
• substances that can be separated into
simpler substances via chemical rxn.
(NaCl, water)
Classification of Matter
MATTER
SUBSTANCE
MIXTURE
ELEMENT
HOMOGENEOUS
COMPOUND
HETEROGENEOUS
Mixture
Physical blend of two or more
substances
Compositions MAY vary
Hetero versus homogeneous
mixture
Classification of Matter
Matter
Substance
Element
Mixture
Compound
Homog.
Heterog.
Completely uniform composition –
components are evenly distributed
(solution)
Classification of Matter
Matter
Substance
Element
Mixture
Compound
Homog.
Heterog.
Not uniform composition – samples
are not the same in different areas
Mixtures
Heterogeneous: not a uniform
composition. Samples of this mixture
are not the same in different areas
Sand, rocks and wood
Homogeneous: completely uniform
composition. Components are evenly
distributed (Solution)
Air, dissolved sugar water, gasoline,
brass
Physical Properties
Quality of a substance that can be
measured without changing the
substance’s composition
Color, solubility, odor, hardness,
density, melting and boiling point
Helps to identify substances
Physical change
Change that alters a substance
without changing its composition
Boil, freeze, dissolve, bend, grind, cut
Change of state
Reversible
Chemical change
One or more substances change into
new substances
Burn, rot, rust, explode, decompose
Energy is given off or absorbed
Odor or color change
Irreversible
States of Matter
http://legacyweb.chemistry.ohio-state.edu/betha/nealGasLaw/fr1.1.html
States of Matter: Solid
Definite volume and shape
Particles packed closely together
Incompressible
Little kinetic energy
Liquid
Particles are in close contact
Can flow; volume takes the shape of
a container
Incompressible; can expand upon
heating
Medium kinetic energy
Gas
Particles take shape and volume
of container
Particles are far apart
Highly compressible
High kinetic energy
2.2 Mixtures
1. Mixture
2. hetero.
3. homogen
4. solution
5. phase
6. components
8. ST
9. AT
10. AT
11. ST
12. F
13. C
14. A
15. E
16. B
17. D
7. distillation
2.2 Mixtures
Question 18
A. homogen.
B. heterogen.
C. homogen.
Question 19
A. Compound
B. Homogen. Mix
C. Compound
D. Homogen. mix
D. heterogen.
E. heterogen.
Matter and Measurement
Question 2
A. element
C. mixture
B. compound D. element
Question 4
A. Solution (homogen. Mix)
B. Solution (homogen. Mix)
C. Heterogeneous mix
Question 8
A. Chlorine Cl
B. Phosphorus P
C. Potassium K
D. Mercury Hg
Question 10
A. Si silicon
B. S Sulfur
C. Fe iron
D. Zn zinc