Question: what are the physical and chemical properties of hydrofluoric acid?
Answer: Hydrofluoric acid is the aqueous solution of hydrogen fluoride gas. It's a clear, colorless, fuming corrosive liquid with a pungent odor severe. Melting point: -83.3 ℃, boiling point: 112.2 ℃, density: 0.888g / cm3. Soluble in water, ethanol, ether-soluble.