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CHEMISTRY SEPTEMBER 23, 2014 Pure Substance vs. Mixture
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SCIENCE STARTER You have 3 minutes Work silently and individually
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NON-NEGOTIABLE ONE SPEAKER – EVERYONE ELSE ACTIVELY LISTEN REMAIN IN YOUR SEAT FOLLOW ALL DIRECTION
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CONSEQUENCES VERBAL WARNINGS – 5 POINTS OFF CALL HOME DETENTION SLIP FROM THE DEAN/AP
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OBJECTIVE SWBAT – Identify the difference between a pure substance and a mixture by providing examples. – Identify the difference between a homogenous mixture and a heterogeneous mixture. – Use a particle diagram to illustrate the difference between a pure substance and a mixture.
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AGENDA – Science Starter – Review of Pure Substance and Mixture – Identify the Separation techniques – Activity
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PURE SUBSTANCE 2 types: – Element – Compound
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QUIZ MAKEUP Next Wednesday – Quiz Makeup 4 th period or 9 th period (up until 4:15PM)
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PURE SUBSTANCE Have constant composition and constant properties
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ELEMENT
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COMPOUNDS Examples: – Carbon dioxide = CO 2 – Sodium Chloride= NaCl – Ammonia = NH 3 – Methane = CH 4 – Hydrochloric Acid = HCl
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MIXTURE Two types: – Homogeneous – Heterogeneous
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MIXTURES Have varied composition and properties
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PARTICLE DIAGRAMS A method by which a box with colorful balls are drawn to represent atoms or molecules.
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PARTICLE DIAGRAMS - ELEMENTS
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PARTICLE DIAGRAMS - COMPOUND
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PARTICLE DIAGRAMS - HOMOGENEOUS
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PARTICLE DIAGRAMS - HETEROGENEOUS
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SEPARATION TECHNIQUES Chromatography Filtration Evaporation Distillation Magnetism
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CHROMATOGRAPHY One type is called Paper Chromatography – Usually used to identify chemicals (coloring agents)
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CHROMATOGRAPHY
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FILTRATION Method for separating an insoluble solid from a liquid – Popularly used in water treatment
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FILTRATION
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EVAPORATION Method used to separating a homogeneous (solution) mixture of a soluble solid and a solvent Involves heating the solution until the solvent evaporates – Examples: water and sugar solution – Heat the solution until the water (solvent) dissolve leaving behind the sugar
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EVAPORATION
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DISTILLATION Method used to separate a liquid from a solution Similar to evaporation but the vapor is collected by condensation
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DISTILLATION
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MAGNETISM Method used to separate two solids with one having magnetic properties
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MAGNETISM
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SEPARATING FUNNEL Method for separating two immiscible liquids (liquids that do not dissolve well) – Oil and water
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SEPARATING FUNNEL
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Activity – Extra Points 1. Draw the Chromatography Experiment – Also include a description of what you did – 5 points 2. Draw the Filtration Experiment – Also include a description of what you did – 5 points
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