12A Homework, Exams, Old Exams

Online Homework

Homework 28 for Week 15 (Objective Objective 15: Develop synthesis strategies for organic synthesis)

Alchemie Mechanisms Homework

This app helps you learn and develop the very important skill of using “curved arrows” to show how bonds break and form in an organic reaction so you can predict and explain the mechanism of a reaction (how an organic reaction occurs) and predict the product(s) of a reaction.

There will be 11 graded Alchemie Mechanisms homework assignments this semester.

The Alchemie Mechanisms app costs $9.99 for full access.

After you download the app from the iOS or Android store onto your tablet or phone, click on “sign in” (upper right corner) to create an account. After you verify your e-mail, click on the gear icon (upper left corner) and enter course code: 2udc55

See the Student registration video for help.

NOTES:

  1. You have to register to earn credit for doing each Mechanisms homework assignment.
  1. See the Menu (upper left corner) for the Task and Goal for each exercise.
  2. If you try the same thing two or three times and it does not work, this means you are doing something wrong. Try something else.
  3. Three (3) Stars is full credit for each exercise.
  4. You will earn a homework grade for the Mechanisms exercises you do this semester: 11 Homework assignments, 71 puzzles total. If you earn Three (3) Stars full credit for all 71 puzzles, you earn full credit for your Homework grade.
  5. SUGGESTION: Draw the reaction on paper first and try using curved arrows to show how bonds break and form going from reactants to products.
  6. IMPORTANT! Make sure you are able to draw the mechanism on paper for each reaction/puzzle using curved arrows (show bonds breaking and forming) and using a known bond making/breaking process.

Make sure you understand each mechanism for the same reaction type using different reactants. Example: elimination reaction using different reactant and different leaving group to make an alkene.

Each HW will be available 1-2 weeks before the due date.

  • HW 1 (Objective 3: Resonance (7 puzzles)) due Thursday, 9/8/22
  • HW 2 (Objective 4: Acid-base reactions (5 puzzles)) due Thursday, 9/15/22
  • HW 3 (Objective 4: Acid-base reactions (3 puzzles)) due Thursday, 9/22/22
  • HW 4 (Objective 4: Review Acid-base reactions (4 puzzles)) due Thursday, 10/20/22
  • HW 5 (Objective 8: Intro to reactivity (7 puzzles)) due Thursday, 10/20/22
  • HW 6 (Objective 9: Substitution Reactions (10 puzzles)) due Thursday, 10/27/22
  • HW 7 (Objective 10: Elimination Reactions (10 puzzles)) due Thursday, 11/3/22
  • HW 8 (Objective 11: Substitution vs. Elimination Reactions (8 puzzles)) due Thursday, 11/10/22
  • HW 9 (Objective 12: Addition reactions of alkenes (7 puzzles)) due Thursday, 11/17/22
  • HW 10 (Objective 13: Addition reactions of alkynes (6 puzzles)) due Sunday, 11/27/22
  • HW 11 (Objective 15: Organic Synthesis Strategies (4 puzzles )) due Thursday, 12/8/22

Textbook Practice Problems

Practice Problems for the 1st and 2nd editions of Klein, “Organic Chemistry” are the same, except for Ch. 8.

  • Chapter 1/36, 40, 43, 48, 50, 51, 56, 64, 66
  • Chapter 2/39, 42, 46, 49, 53, 55, 56, 57, 58, 64, 65, 66
  • Chapter 15/ IR
  • Chapter 3/36, 39, 41, 44, 47, 49, 50, 52
  • Chapter 4/41, 42, 43, 45, 46, 51, 54, 57, 66abegh
  • Chapter 5/32, 36acgi, 39afh, 43, 46, 51, 55
  • Chapter 6/21, 27, 30, 31, 36, 38, 44, 45, 47, 49
  • Chapter 7/38, 40, 51, 54, 55, 59, 60, 62, 66
  • Klein, 1st ed., Ch. 8 problems: 51, 55, 62, 63, 67, 69, 75, 77abc, 78efjk, 79
  • Klein, 2nd ed., Ch. 8 problems: 51, 55, 62, 63, 67, 69, 74, 76abc, 77efjk, 78
  • Chapter 9/50, 57, 60, 63, 64, 68, 70, 75
  • Chapter 10/36, 40, 41, 46, 52, 53, 59, 60
  • Chapter 11/22, 27, 28, 33, 38, 45
  • Chapter 12/17, 18, 23, 27, 28

Quizzes and Exams

Multi-Objective Question 4 and Quiz 10 and 11 on 12/7/22

Old Exams

12A Exams and Final Exam Fall 2009

12A Exams and Final Exam Fall 2011

12A Exams and Final Exam Fall 2014