Answer: Hydrofluoric acid or HF is an extremely corrosive acid. However, it is a weak acid and not a strong acid because it does not completely dissociate in water (which is the definition of a strong acid) or at least because the ions it forms upon dissociation are too strongly bound to each other for it to act as a strong acid. Why Hydrofluoric Acid is a Weak Acid. Hydrofluoric acid is the only hydrohalic acid (e.g., HCl, HI) that is not a strong acid. Hydrogen fluoride does actually dissolve fairly freely in water, but the H3O+ and F- ions are strongly attracted to each other and form the strongly bound pair, H3O+ Â· F-.
Burning Man festival burns its 60-foot man. BLACK ROCK CITY, Nev. â This festival's eponymous Burning Man did just that on Saturday night as 70,000 people in the Nevada desert said farewell to days of dust and freewheeling living. Post to Facebook.
Since then, the gathering has been organised by the Burning Man Project and has become an annual event which this year was attended by over 70,000 'burners'. And for many, it marks the end of summer, the festival is rounded off by living up to its title -- with the burning of a giant wooden man-shaped construct.