Chem II

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Chem II
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Seating Chart
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Distribute Syllabus
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The Syllabus all Power Point Presentations are
attached to Polys Website.
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All homework assignments will be assigned to
Polys Website.
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Policy

• Dress code violations, which cannot be rectified,
  are to be sent directly to the GLA

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Policy

• Electronic devices, other than calculators, are
  to be confiscated sent directly to the GLA

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Policy

• Electronic devices that have been confiscated
  will only be returned to a guardian.

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Pull out your notebooks as class begins on the
next slide
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To be successful in chemistry, you must be
competent in algebra.
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Solve for Y
AB CDE X Y

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Solve for Y
ABY CDEX

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Solve for Y
Y CDEX AB

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Scientific Method
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• A systematic method for performing research

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Scientific Method

• Observing
• Hypothesizing
• Experimenting
• Analyzing

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Hypothesis
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An educated guess
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Variables
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• Anything that changes or can be changed in an
  experiment

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Independent Variable
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• The variable that is changed by the person doing
  the experiment

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Dependent Variable
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• A variable that changes due the effects of the
  independent variable being changed

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Scientific Law
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Any fact that has been proven beyond any doubt
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Scientific Theory
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• An idea that is supported by much scientific data
  and is accepted by the scientific community as
  correct, but cannot be proven

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Problem Solving
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What do you have?

• Identify whats given
• List the variables

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What do you want?

• Identify whats being asked for
• Identify the problem

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How do you get it?

• Identify a formula or an algorithm that can be
  used to solve the problem

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Chemistry

• The study of matter

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Matter

• Anything that
• takes up space
• has mass
• has inertia

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Mass

• The measure of the amount of matter

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Types of Matter

• Pure one kind of substance
• Mixture 2 or more substances

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Substance

• A specific type of matter

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Pure Substances

• Elements
• Compounds

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Element

• Any pure substance that contains only one kind of
  atom

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Compound

• A pure substance made up of 2 or more elements
  chemically combined

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Mixture

• A Physical blend of substances

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Mixture

• Each part retains its properties

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Mixture

• Mixtures can be separated by physical means

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Mixtures

• Heterogeneous
• Homogenous

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Heterogeneous Mixture

• Made up of multiple phases
• Non-uniform

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Phase

• Any physically separate part of a substance

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Interface

• Where two phases come together

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Homogeneous Mixture

• Made up of only one phase
• Uniform throughout

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Solution

• Homogeneous mixture

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Solute

• Any of the lesser portions of a solution
• What has been dissolved

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Solvent

• The larger portion of a solution
• What is doing the dissolving

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CHM II HW

• Review PP 1 4 that are attached to Polys
  website
• Work the attached HW problem

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Separating Mixtures

• Filtration
• Distillation
• Precipitation
• Chromatography

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Filtration

• Separation by size
• Passing through pores

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Distillation

• Separation by differences in B.P.
• Boil collect

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Precipitation

• Separation by differences in solubility
• Allow solutions to ppt

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Chromatography

• Separation through charge or polarity differences
• Separating ink on paper

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Classify each of the following as Pure element
or compoundMixture hetero. or homo
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• Air, water, mud, the sea, aluminum, orange juice,
  brass, gold

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List and describe all types of pure substances
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List and describe all types of mixtures