what does the word alum mean?

Answer 1

ALUM IS THE COMMON NAME FOR SODIUM POTASSIUM ALUMINATE
IT IS USED FOR PURIFICATION

Answer 2

Alum, Allom [aluminium potassium sulfate], in chemistry, is a term given to the crystallized double sulfates of the typical formula M+2SO4·M3+2(SO4)3·24H2O, where M+ is the sign of an alkali metal (lithium, sodium, potassium, rubidium, or caesium), and M3+ denotes one of the trivalent metal ions (typically aluminium, chromium, or iron (III)). The ammonium ion (NH4+) also occurs in the M+ position.

These salts are employed in dyeing and various other industrial processes. They are soluble in water; have an astringent, acid, and sweetish taste; react acid to litmus; and crystallize in regular octahedra. When heated they liquefy; and if the heating is continued, the water of crystallization is driven off, the salt froths and swells, and at last an amorphous powder remains.

Potassium alum is the common alum of commerce, although both soda alum and ammonium alum are manufactured.

Answer 3

An "Alum" is short for Alumnus...

That means someone who graduated from a certain school.

For example you could say:
" Jane and I have a lot in common she is a State University Alum, like me."

Answer 4

In water treatment, the word alum is short for aluminum sulfate, the chemical used for coagulation.

Answer 5

An Alum is an alumnus from a college, university, or place of education, one where they have graduated from.

Answer 6

It covers a variety of sulfate salts (some not containing aluminum).