Is a carboxylic acid soluble or insoluble in an aqueous solution? How?

Answer 1

soluble in water, it's polar (water is also polar) and like dissolves like.

Answer 2

Lower carboxylic acids [1 to 4 carbons] are miscible with water while higher carboxylic acids are very much less soluble due to the increasing hydrophobic nature of the alkyl chain. They tend to be more soluble in the less polar solvents such as ethers and alcohols. Carboxylic acids are polar thus water soluble but the higher carboxylic acids don't tend to dissolve readily in water.