Give two examples each of acids that are liquids and solids. What substances show the properties of acids only in aqueous solution?

Solid acids: Boric acid: H3BO3 Oxalic acid: H2C2O4
Liquid acids: Sulfuric acid: H2SO4 Hydrochloric acid: HC1
Water-soluble acids exhibit acidic properties in an aqueous solution, since they dissociate into hydrogen ions and ions of the acid residue.

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