Chapter 4: Problem 81
Assign the oxidation state for nitrogen in each of the following. a. \(\mathrm{Li}_{3} \mathrm{~N} \quad\) f. \(\mathrm{NO}_{2}\) b. \(\mathrm{NH}_{3} \quad\) g. \(\mathrm{NO}_{2}^{-}\) c. \(\mathrm{N}_{2} \mathrm{H}_{4} \quad\) h. \(\mathrm{NO}_{3}\) d. NO i. \(\mathrm{N}_{2}\) e. \(\mathrm{N}_{3} \mathrm{O}\)
Short Answer
Step by step solution
Assign oxidation states for each compound
Rule 1 (Alkali metals)
Rule 3 (Sum of oxidation states)
Rule 2 (Hydrogen)
Rule 3 (Sum of oxidation states)
Rule 2 (Hydrogen)
Rule 3 (Sum of oxidation states)
Rule 4 (Oxygen)
Rule 3 (Sum of oxidation states)
Rule 4 (Oxygen)
Rule 3 (Sum of oxidation states)
Rule 4 (Oxygen)
Rule 3 (Sum of oxidation states)
Rule 4 (Oxygen)
Rule 3 (Sum of oxidation states)
Rule 4 (Oxygen)
Rule 3 (Sum of oxidation states)
Rule 5 (Same element)
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Nitrogen Compounds
- 尝颈鈧僋: A compound where lithium is bound to nitrogen.
- 狈贬鈧: Known as ammonia, a common nitrogen compound.
- 狈鈧侣鈧: Hydrazine, used as a rocket propellant.
- NO: Nitric oxide, involved in various biological processes.
- 狈鈧僌: Azide oxide, less common but still important in chemistry.
- 狈翱鈧: Nitrogen dioxide, a significant air pollutant.
- 狈翱鈧傗伝: Nitrite, found in various biological systems.
- 狈翱鈧: Nitrate, commonly found in fertilizers.
- 狈鈧: Molecular nitrogen, making up most of Earth's atmosphere.
Rules for Assigning Oxidation States
- Alkali Metals: Always have an oxidation state of +1.
- Hydrogen: Typically, +1 when bonded to non-metals.
- Oxygen: Generally, -2 in compounds.
- Sum of Oxidation States: The total must equal the overall charge of the compound.
- Same Element: In diatomic molecules like N鈧, the oxidation state is 0.
Oxidation State Calculations
Example: Li鈧僋
Lithium, being an alkali metal, has +1. With three lithium atoms, the total is +3, so nitrogen must be -3 to balance.Example: NH鈧
With hydrogen at +1, the three hydrogens total +3. Therefore, nitrogen is -3 to create a neutral molecule.Example: NO
Oxygen is -2; thus, nitrogen must be +2 for a balanced equation.Consistently applying these calculations ensures accurate representation of each element's oxidation state.
Redox Chemistry
- Reduction: Gain of electrons, decreasing the oxidation state.
- Oxidation: Loss of electrons, increasing the oxidation state.
- Balancing Redox Reactions: Requires equalizing both the mass and charge.