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Crystal of potassium alum, KAl(SO 4) 2 ·12H 2 O. An alum (/ ˈ æ l ə m /) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula X Al(SO 4) 2 ·12 H 2 O, such that X is a monovalent cation such as potassium or ammonium. [1] By itself, "alum" often refers to potassium alum, with the ...
The words "alum/alums" and "alumn/alumns" (pronounced with a silent "n") are both pronounced with the accent on the second syllable (al-UM), as opposed to the chemical compound alum and its plural, "alums" (pron. AL-um). [17] Many universities have alumni offices that coordinate fundraising and offer benefits to registered alumni.
The English name alum does not come directly from Latin, whereas alumine/alumina comes from the Latin word alumen (upon declension, alumen changes to alumin-). One example was Essai sur la Nomenclature chimique (July 1811), written in French by a Swedish chemist, Jöns Jacob Berzelius , in which the name aluminium is given to the element that ...
Crystals of alum, the naturally occurring form of which was known back to the ancients.. The history of aluminium was shaped by the usage of its compound alum.The first written record of alum was in the 5th century BCE by Greek historian Herodotus. [2]
Alum is a species and class of chemical compound. Potassium alum, the prototypical member of the class, is often referred to simply as alum. Alum may also refer to: Alum, Texas, a community in the US; Alumnus, a graduate of a particular institution; Alum Pot, a pothole in Simon Fell, North Yorkshire, England
“The word c--- was trending this year,” Berner, 33, began during her stand-up portion of the special, which premiered on Friday, December 27. ... The Gossip Girl alum also accused him of ...
Teddi Mellencamp is getting candid about her feelings after filing for divorce from Edwin Arroyave. The Real Housewives of Beverly Hills alum, 43, shared on the latest episode of her Diamonds in ...
Alum is a natural crystalline product widely used both historically and in modern times as a deodorant, because it inhibits bacterial action. The word 'alum' is a historical term for aluminum sulfate salts, therefore all alum products will contain aluminum, albeit in a different chemical form from antiperspirants.