Carboxylic acids react with ammonia to yield ammonium salts, which upon heating decompose to produce_______________?
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Answer: D. Acidamide
Explanation
Heating ammonium salts of carboxylic acids causes them to dehydrate and form acid amides. Thermal energy drives off a molecule of water from the intermediate salt structure. This dehydration reaction provides a reliable laboratory method for synthesizing primary amides. Carboxylic acids react with ammonia to produce stable ionic ammonium carboxylate salts initially. Acid amides contain a carbonyl group attached to a nitrogen atom with the general formula RCONH2. Thermal dehydration requires controlled heating to prevent unwanted side reactions or decomposition.
Amides are essential functional groups found in proteins, nylon polymers, and many pharmaceutical drugs. Organic synthesis pathways frequently convert carboxylic acids into amides for further chemical transformations. Understanding derivative formation helps chemists build complex organic molecules step by step. Carbon dioxide is released during different decarboxylation reactions rather than simple amide formation. Alkanes are produced through complete reduction of acids rather than thermal dehydration of ammonium salts. Esters are synthesized through the reaction of carboxylic acids with alcohols in the presence of acid catalysts.
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