Chapter1IM

Chapter1IM - Chapter 1 Chemistry: The Study of Change This...

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Chapter 1 Chemistry: The Study of Change This introductory chapter tells students the importance and relevance of studying chemistry. Upon completion of this chapter, the students should be able to: 1. Give examples of how chemistry is used in everyday life. 2. Explain the scientific method and how it is used. 3. Classify materials in terms of homogeneous and heterogeneous mixtures. 4. Distinguish between compounds and elements. 5. Explain physical versus chemical properties. 6. Name the commonly used SI unit prefixes. 7. Solve problems involving density, volume, and mass. 8. Convert between degrees for the Kelvin, Celsius, and Fahrenheit temperature scales. 9. Apply scientific notation and use proper number of significant figures in problem solving. 10. Discuss the difference between accuracy and precision. 11. Utilize the factor-label method of problem solving. 12. Name the common conversion factors for the metric system to English system. Examples of such conversion factors include grams to pounds, centimeters to inches and liters to gallons. Section 1.1 Chemistry: A Science for the Twenty-First Century Students often wonder why they are required to take chemistry. Show them how chemistry, the Central Science, applies to their career choices. Assign them to find an article in a trade magazine of their field or in the popular press that involves chemistry. As your author has pointed out, everything from modern medicine to energy sources to “molecular computing” involve chemistry. Section 1.2 The Study of Chemistry It is important to emphasize that chemists – in fact, all scientists – make observations. Students have made observations through their own experiences (macroscopic world). Building on students’ observations makes the information from relevant, thus making it easier for them to comprehend. The microscopic world is more difficult for students since they have not experienced it. It is important that students “see” what is happening on the microscopic level in order to understand their experience at the “macroscopic level”. Section 1.3 The Scientific Method Most students are introduced to the scientific method early in their education. The scientific method includes: a) defining the problem; b) make qualitative and quantitative observations; c) recording the data; d) interpreting the data into a hypothesis; e) testing the hypothesis with more observations until a theory is developed; and f) examining the theory over time until a law is accepted
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Section 1.4 Classification of Matter A mixture is a combination of two or more substances in which the substances retain their distinct identities. Different mixtures can have different compositions just like two solutions of
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Chapter1IM - Chapter 1 Chemistry: The Study of Change This...

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