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When nitrous acid (HNO₂) is produced in situ and undergoes disproportionation in water at room temperature, which products are formed?

1. H₃O⁺, NO₃⁻, and NO
2. H₃O⁺, NO₃⁻, and NO₂
3. H₃O⁺, NO₂⁻, and NO₂
4. H₃O⁺, NO₃⁻, and N₂O

Correct answer: H₃O⁺, NO₃⁻, and NO

Solution

The products formed when nitrous acid (HNO₂) undergoes disproportionation in water at room temperature are H₃O⁺, NO₃⁻, and NO because the disproportionation reaction involves the transfer of an oxygen atom from one molecule of HNO₂ to another, resulting in the formation of these products.

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