Chemistry 161  Exam #2 Study Guide

Instructor: Ken Marr

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Syllabus (Microsoft Word doc.)          

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Exam #2. Exam 2 covers the material in chapters 3-4, labs 3-6 and all ALE's for chapters 3 & 4 (i.e. ALE's 10-19). Scroll down this page for a links to a practice exam (short answer questions) and practice questions (multiple choice) for exam 2. The exam consists entirely of short answer questions--no multiple choice. See the practice exam to get an idea of the kind of questions to expect.

Exam #2 will be administered in the GRCC Testing Center outside of class time--see the Chem 161 syllabus for the test date and time. Give yourself ~2 hours to take the exam.

Bring the following with you to the exam:

• Picture I.D.

• Non-programable calculator

• Pencil(s) and eraser

• A well rested body and mind!

Stuff to concentrate on while reviewing:

1. Terms/Concepts
   1. Atomic mass
   2. Mole, Avogadro's number
   3. Solute, solvent and concentration
   4. The interaction of ionic solutes with water
   5. Double displacement and single displacement reactions
   6. Acid–base reactions
   7. Precipitation reactions
   8. Oxidation, reduction, oxidizing agent, reducing agent, redox reactions
   9. Limiting and excess reagents
   10. Conservation of mass
2. Skills/Background Knowledge
   1. Molecular mass (weight)
   2. Percent composition
   3. Conversions involving moles and number of atoms or molecules
   4. Preparation of molar solutions
   5. Balancing equations and mole ratios
   6. Writing and molecular, total ionic and net ionic equations
   7. Determination if a reaction is a redox reaction
   8. Balancing of simple redox equations
   9. Elemental symbols and names of ions, and their charges
3. Problem solving abilities
   1. Concentrations of solutions, including molarity and % (w/v) and (w/w)
   2. Stoichiometric calculations, including:
      1. Mole to Mole
      2. Mole to Mass
      3. Mass to Mole
      4. Mass to Mass
      5. Calculations involving solutions
      6. Limiting reagent
      7. Theoretical yield and percent yield
   3. Empirical and molecular formulas
4. Naming compounds & writing formulas of compounds

• Understand These Concepts. Chapter 3: 1-14 on page 128. Chapter 4: 1-11 on page 176

• Master These Skills. Chapter 3:  1-12 on page128.  Chapter 4: 1-9 (omit #'s 10-11) on page 176.

• All ALE's for Chapters 3 and 4 (i.e. ALE's 10 -19)

• Check out this Practice Test  The practice exam is in Adobe Acrobat .pdf  format. If you do not have Acrobat reader on your computer, you may download it for free at http://www.adobe.com/products/acrobat/readermain.html  

• Here are some good Practice Questions: quiz questions for all chapters from the Silberberg Online Learning Center: http://www.mhhe.com/physsci/chemistry/silberberg/student/olc/quiz.mhtml. These questions are intended to help you identify areas of strength and areas where further review is needed. 

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© Kenneth R. Marr 2001