Download PDF Chemistry The Central Science 13TH Edition by Theodore L. Brown

Sinopsis

Authors traditionally revise roughly 25% of the end of chapter questions when producing a new edition. These changes typically involve modifying numerical variables/identities of chemical formulas to make them “new” to the next batch of students. While these changes are appropriate for the printed version of the text, one of the strengths of MasteringChemistry® is itsability to randomize variables so that every student receives a “different” problem. Hence, the effort which authors have historically put into changing variables can now be used to improve questions. In order to make informed decisions, the author team consulted the massive reservoir of data available through MasteringChemistry® to revise their question bank. In particular, they analyized which problems were frequently assigned and why; they paid careful attention to the amount of time it took students to work through a problem (flagging those that took longer than expected) and they observed the wrong answer submissions and hints used (a measure used to calculate the difficulty of problems). This “metadata” served as a starting point for the discussion of which end of chapter questions should be changed.
 

For example, the breadth of ideas presented in Chapter 9 challenges students to understand three-dimensional visualization while simultaneously introducing several new concepts (particularly VSEPR, hybrids, and Molecular Orbital theory) that challenge their critical thinking skills. In revising the exercises for the chapter, the authors drew on the metadata as well as their own experience in assigning Chapter 9 problems in Mastering Chemistry. From these analyses, we were able to articulate two general revision guidelines.

Content

1.  Introduction: Matter and Measurement
2.  Atoms, Molecules, and Ions 
3. Chemical Reactions and Reaction Stoichiometry 
4. Reactions in Aqueous Solution 
5. Thermochemistry 
6. Electronic Structure of Atoms 
7. Periodic Properties of the Elements 
8. Basic Concepts of Chemical Bonding 
9. Molecular Geometry and Bonding Theories 
10. Gases 
11. Liquids and Intermolecular Forces 
12. Solids and Modern Materials 
13. Properties of Solutions 
14. Chemical Kinetics 
15. Chemical Equilibrium 
16. Acid–Base Equilibria 
17. Additional Aspects of Aqueous Equilibria 
18. Chemistry of the Environment 
19. Chemical Thermodynamics 
20. Electrochemistry 
21. Nuclear Chemistry 
22. Chemistry of the Nonmetals 
23. Transition Metals and Coordination Chemistry 
24. The Chemistry of Life: Organic and Biological Chemistry

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