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Ch.22 - The Main Group Elements
Chapter 22, Problem 161

Of ammonia, hydrazine, and hydroxylamine, which reacts to the greatest extent with the weak acid HNO₂? Consult Appendix C for equilibrium constants.

Verified step by step guidance
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Step 1: Identify the chemical species involved in the reaction with the weak acid HNO₂. These are ammonia (NH₃), hydrazine (N₂H₄), and hydroxylamine (NH₂OH).
Step 2: Understand that the extent of reaction with a weak acid is determined by the base strength of the chemical species. The stronger the base, the more it will react with the weak acid.
Step 3: Consult Appendix C for the equilibrium constants, specifically the base dissociation constants (K_b) for ammonia, hydrazine, and hydroxylamine. These constants indicate the strength of each base.
Step 4: Compare the K_b values of ammonia, hydrazine, and hydroxylamine. The species with the highest K_b value is the strongest base and will react to the greatest extent with the weak acid HNO₂.
Step 5: Conclude which species has the highest K_b value and therefore reacts the most with HNO₂, based on the comparison of the equilibrium constants.
Related Practice
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Chlorine reacts with molten sulfur to yield disulfur dichloride, a yellowish-red liquid. Propose a structure for disulfur dichloride.

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