Chemistry 2e · 18.7 Occurrence, Preparation, and Properties of Nitrogen

Occurrence, Preparation, and Properties of Nitrogen: practice problems

4 problems from the book, with its answers. Check your working, or have any of them explained to you on the whiteboard.

1. Exercises 59

   Write the Lewis structures for each of the following:

   (a) NH²⁻

   (b) N₂F₄

   (c) ${\text{NH}}_2{}^{-}$

   (d) NF₃

   (e) ${\text{N}}_3{}^{-}$

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2. Exercises 61

   Explain how ammonia can function both as a Brønsted base and as a Lewis base.

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3. Exercises 63

   For each of the following, draw the Lewis structure, predict the ONO bond angle, and give the hybridization of the nitrogen. You may wish to review the chapters on chemical bonding and advanced theories of covalent bonding for relevant examples.

   (a) NO₂

   (b) ${\text{NO}}_2{}^{-}$

   (c) ${\text{NO}}_2{}^{+}$

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4. Exercises 65

   Although PF₅ and AsF₅ are stable, nitrogen does not form NF₅ molecules. Explain this difference among members of the same group.

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