Development of the Modern Freezer. Bacteria are usually the cause of food decay, but they can't grow as well or at all in freezing temperatures, which are at 32 degrees Fahrenheit (0 degrees Celsius) or lower.
HF- polar molecule: dipole-dipole forces. There are also dispersion forces and H bond between HF. BF3- nonpolar: dispersion forces. Ar- Dispersion forces between Ar atoms.
Hydrofluoric Acid Fact Sheet. CHEMICAL AND PHYSICAL PROPERTIES. Hydrofluoric acid or HF is a polar, colorless solution made up of water and hydrogen fluoride. It has a p K a 3.15, making it a weak acid.Despite this property, it is extremely hazardous to human health and corrosive. The most common use in the laboratory is that it serves as a precursor for making pharmaceuticals and polymers. It is also commonly used for glass etching in such capacities as geology.t has a p K a 3.15, making it a weak acid. Despite this property, it is extremely hazardous to human health and corrosive. The most common use in the laboratory is that it serves as a precursor for making pharmaceuticals and polymers. It is also commonly used for glass etching in such capacities as geology.