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Acids and Bases

Which are the strongest acidic and the strongest basic compounds in the world?


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June 09, 2009 6:38PM

Currently the strongest super acid system, is a mixture of three different chemicals:

# Fluorosulfuric acid (FSO3H) # Antimony pentafluoride (SbF5) # Sulfur trioxide (SO3) The mixture produces the strongest superacid system in the world, it is also highly corrosive. It beats even the previous record, Fluoroantimonic acid, an 80% mixture of Antimony pentafluoride (SbF5) and 20% Hydrofluoric acid (HF).

Since there is no commonly accepted definition for what qualifies as a superbase, a single most powerful base is disputed, however there are three main classes of superbases: organic, organometallic, and inorganic.

* For organic superbases, the combination of tert-butyllithium and potassium tert-butoxide, are commonly used * For organometallic superbases, the Grignard reagents, unstabilized alkoxides or lithium diisopropylamide are often cited * For inorganic superbases, salts with highly charged, small negative ions, e.g. lithium nitride, or alkali and earth alkali metal hydrides (sodium hydride, calcium hydride) are superbases