Lewis acid

Lewis acid

noun Chemistry.
any substance capable of forming a covalent bond with a base by accepting a pair of electrons from it.

Origin:
1940–45; named after G. N. Lewis
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Lewis acid is always a great word to know.
So is alum. Does it mean:
a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium
a colorless, oily, water-soluble, highly toxic, liquid alkaloid, C10H14N2, found in tobacco and valued as an insecticide
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World English Dictionary
Lewis acid
 
n
Compare Lewis base a substance capable of accepting a pair of electrons from a base to form a covalent bond
 
[C20: named after G. N. Lewis (1875--1946), US chemist]

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