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