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Lecture 8.26.09 - calculations involving molarity that you...

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Wednesday, 8/26/2009 CHEM 1251, FALL 2009 Learning Goals for this Course -- BIG IDEAS These ideas will cycle throughout the semester: 1. What is the nature of matter? 2. How can we predict the properties of matter, and how is the periodic table helpful? 3. What makes chemical react, and why do reactions go in a particular direction? 4. How can we quantify changes in chemical reactions? Framing Scenario for first two topic areas You are a global health worker employed by the Gates Foundation in Zimbabwe. A cholera outbreak seems likely, and there is no way to order prepackaged sterile intravenous drip solution in time--you’re going to have to prepare it and sterilize it yourself. The solution must be 51 mM NaCl and 185 mM glucose, and you need to prepare 500 liters. You have one chance to phone in the correct order in kilograms for NaCl and glucose. Time to remember the metric system, conversion factors, chemical formula-writing, and concepts and
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Unformatted text preview: calculations involving molarity that you learned in General Chemistry! Which of the following dart-throwing sessions was precise but not accurate? A. B. C. D. B. C. D. Which two dart-throwing experiments are most accurate ? (Silberberg Problem 1.73) a. I and II b. II and III c. III and IV d. I and III e. II and IV Which two dart-throwing experiments are most accurate ? (Silberberg Problem 1.73) a. I and II b. II and III c. III and IV d. I and III e. II and IV Wednesday, 8/26/2009 CHEM 1251, FALL 2009 In which setting is having accurate (not just a precise) results most important? A. A research laboratory B. A crime lab C. A medical lab D. Global health worker making intravenous drip solution Figure 1.10 Which of the following represents the contents of the hydrogen-filled balloon from Monday’s demonstration ?...
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