Presentation on theme: "Topic: Pure Substances & Mixtures Date: 10/29/2012"— Presentation transcript:
1 Topic: Pure Substances & Mixtures Date: 10/29/2012 Cornell Notes: Make sure that you have the Guided Notes sheet from up front, which you will attach into your notebook.Topic: Pure Substances & MixturesDate: 10/29/2012
3 Today’s Game Plan Catalyst 10 minutes Pure Substances and Mixtures Raise ‘em up!!Go with the Flow…Chart5 minutesIndependent Practice/assign homework
4 Pure SubstancesComposition is the same throughout and does not vary from sample to sample.CANNOT be broken down by physical changesCan be an element or compound.
5 Element Definition: substances in their simplest forms Cannot be broken down by a physical or chemical changeFound on the periodic tableMade up of one type of atom
6 Examples of Elements: Hydrogen Carbon Lithium Gold What are two other examples of elements not listed above? What do all elements have in common?
7 CompoundDefinition: substance formed by the chemical combination of two or more elementscan be broken into simpler substances by a chemical change+= Compound
8 Law of Definite Proportions A compound is always composed of the same elements in the same proportions.In other words, Carbon Dioxide (CO2) is always composed of 1 atom of C and 2 atoms of O.If there are different amounts of carbon or oxygen, it is no longer carbon dioxide.
10 MixtureDefinition: two or more pure substances (elements or compounds) that are mixed together but NOT joined chemicallyNOT a pure substanceExamples: The air we breath, gasoline for cars, the sidewalk on which we walk
11 Homogeneous Mixtures Uniform in composition and appearance Same proportion of components throughoutConsists of two or more substances in the same phaseAlso called solutions
12 Heterogeneous Mixtures variable appearance and composition
13 Today’s Game Plan Catalyst 10 minutes Pure Substances and Mixtures Raise ‘em up!!Go with the Flow…ChartIndependent Practice/assign homework5 minutes
14 Raise ‘em Up!Look at the following example and with your partner determine if it is a heterogeneous mixture, homogeneous mixture, element, or compoundChicken noodle soupStrawberry banana smoothieCoca-colaPurified waterHelium