chem ii. poly policy dress code violations, which cannot be rectified, are to be sent directly to...
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Poly Policy Electronic devices, other than calculators, are to be confiscated & sent directly to the GLATRANSCRIPT
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 XY
= CDE
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