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3.23: Quiz 4B

  • Page ID
    19324
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    1. Clearly indicate true (T) or false (F) for the following statements (2 pts each):
    _____ [CH3O] is a stronger base than [CH3NH]
    _____ A Lewis acid is a compound that donates a pair of electrons.
    _____ The higher the energy of activation, the more slowly the reaction will take place.
    _____ A more stable chemical species is higher in energy.
    1. Give the best answer for the following multiple choice questions: (2 pts each)

    Which of the following molecules will have a higher boiling point?

    2i.pngBox.png

    Which of the following compounds is not a nucleophile?

    1. Box.pngCH3ONa
    2. BF3
    3. NH3
    4. CH3OH

    Which of the following is the weakest base?

    2ii.pngBox.png

    Which of the following is incorrect?Box.png

    1. Delocalized electrons destabilize a compound
    2. Resonance stabilization is the extra stability a compound gains from having delocalized electrons
    3. When there are a greater number of relatively stable resonance contributors, then a molecule will have greater resonance stabilization
    4. both A and C
    5. both B and C
    1. (6 pts) Acrylamide is a potential carcinogen that can occur when starchy foods (such as potatoes) are fried or roasted. Compare the structures of acrylamide and allylamine. Circle the compound that has a more nucleophilic nitrogen and explain your answer.

    3.png

    1. (8 pts) Which compound (A or B) is a stronger acid? Provide the following information:
      1. draw the conjugate base (deprotonated form) of EACH molecule given
      2. circle the original acidic molecule that is more acidic (has the lowest pKa)
      3. provide a brief explanation for your choice

    1. 4a.png


    2. 4b.png

    1. (6 pts) Indicate whether each of the following molecules is more likely to behave as a nucleophile (N) or electrophile (E):

    5.png

    1. (8 pts) Clearly label the nucleophile (N) and electrophile (E) for each reaction. Then write the product(s) of the following reaction, and show curved arrows for the movement of electrons. Donʼt forget to include formal charges in the product(s)!

    6.png

    1. Extra Practice: (4 pts) Vitamin C, also known as ascorbic acid, has an acidic proton. Indicate which of the following protons is most acidic, and provide an explanation that includes structures to support your answer. (you only get points for your explanation, not guessing which proton…)

    Extra.png


    3.23: Quiz 4B is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts.

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