M1_1-student - Chemistry XXI Unit 1 How do we distinguish...

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Unformatted text preview: Chemistry XXI Unit 1 How do we distinguish substances? Have you ever wondered: how we extract caffeine from coffee? how we detect pollutants in the air we breathe? how we figure out how much fat is in our food? how we know whether this is blood or paint? Chemistry XXI Chemical thinking allows us to answer many fundamental questions about: Substances Processes In our world. Unit Focus Focus for this Unit Chemistry XXI The central goal of this unit is to help you understand and apply basic ideas that can be used to distinguish the different substances present in a system. Unit 1 How do we distinguish substances? M1. Searching for Differences Identifying differences that allow us to separate components. M2. Modeling Matter Using the particulate model of matter to explain differences. M3. Comparing Masses Characterizing differences in particles mass and number. M4. Determining Composition Characterizing differences in particles composition. Chemistry XXI Unit 1 How do we distinguish substances? Module 1: Searching for Differences Central goal: To identify distinctive properties of substances present in a system that can be used to identify and separate them. Chemistry XXI The Challenge Imagine you are interested in investigating the properties and composition of certain system, from the Earths atmosphere to an unknown material found in a crime scene or polluting the ocean. How would you analyze the system? What properties would you measure? How would you separate its different components?...
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This note was uploaded on 04/09/2009 for the course CHEM 151 taught by Professor Staff during the Fall '08 term at University of Arizona- Tucson.

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M1_1-student - Chemistry XXI Unit 1 How do we distinguish...

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