Chem II
Poly Policy
•Dress code violations,
which cannot be
rectified, are to be sent
directly to the GLA
Poly Policy
•Electronic devices, other
than calculators, are to
be confiscated & sent
directly to the GLA
Poly Policy
•Electronic devices that
have been confiscated
will only be returned
to a guardian.
Chemistry II
information will be
presented by Power
Point Presentation.
All of the Power Point
Presentation for this
course are attached to the
HW section of Poly’s
website under the name
Chemistry II Power
Points.
To be successful
in chemistry, you
must be
competent in
algebra.
Solve for Y
AB = CDE
XY
Scientific
Method
•A systematic
method for
performing
research
Scientific Method
•Observing
•Hypothesizing
•Experimenting
•Analyzing
Hypothesis
An
educated
guess
Variables
•Anything that
changes or can
be changed in an
experiment
Independent
Variable
•The variable that
is changed by the
person doing the
experiment
Dependent
Variable
•A variable that
changes due the
effects of the
independent variable
being changed
Scientific
Law
Any fact that
has been proven
beyond any
doubt
Scientific
Theory
•An idea that is supported
by much scientific data
and is accepted by the
scientific community as
correct, but cannot be
proven
Problem
Solving
What do you have?
•Identify what’s given
•List the variables
What do you want?
•Identify what’s being
asked for
•Identify the problem
How do you get it?
•Identify a formula or
an algorithm that can
be used to solve the
problem
Chemistry
•The study of
matter
Matter
•Anything that:
• takes up space
•has mass
•has inertia
Mass
•The measure
of the amount
of matter
Types of Matter
•Pure: one kind of
substance
•Mixture: 2 or more
substances
Substance
•A specific
type of matter
Pure Substances
•Elements
•Compounds
Element
•Any pure substance
that contains only
one kind of atom
Compound
•A pure substance
made up of 2 or more
elements chemically
combined
Mixture
•A Physical
blend of
substances
Mixture
•Each part
retains its
properties
Mixture
•Mixtures can be
separated by
physical means
Mixtures
•Heterogeneous
•Homogenous
Heterogeneous
Mixture
•Made up of
multiple phases
•Non-uniform
Phase
•Any physically
separate part of
a substance
Interface
•Where two
phases come
together
Homogeneous
Mixture
•Made up of only one
phase
•Uniform throughout
Solution
•Homogeneous
mixture
Solute
•Any of the lesser
portions of a solution
•What has been
dissolved
Solvent
•The larger portion of
a solution
•What is doing the
dissolving
Separating Mixtures
•Filtration
•Distillation
•Precipitation
•Chromatography
Filtration
•Separation by size
•Passing through
pores
Distillation
•Separation by
differences in B.P.
•Boil & collect
Precipitation
•Separation by differences
in solubility
•Allow solutions to ppt
Chromatography
•Separation through charge
or polarity differences
•Separating ink on paper
Classify each of the
following as:
Pure: element or
compound
Mixture: hetero. or
homo
•Air, water, mud,
the sea, aluminum,
orange juice, brass,
gold
List and describe
all types of pure
substances
List and describe
all types of
mixtures