AlumAn alum (ˈæləm) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula XAl(SO4)2·12 H2O, where X is a monovalent cation such as potassium or ammonium. By itself, "alum" often refers to potassium alum, with the formula KAl(SO4)2·12 H2O. Other alums are named after the monovalent ion, such as sodium alum and ammonium alum. The name "alum" is also used, more generally, for salts with the same formula and structure, except that aluminium is replaced by another trivalent metal ion like chromium^III, and/or sulfur is replaced by another chalcogen like selenium.
Potassium alumPotassium alum, potash alum, or potassium aluminium sulfate is a chemical compound: the double sulfate of potassium and aluminium, with chemical formula KAl(SO4)2. It is commonly encountered as the dodecahydrate, KAl(SO4)2·12H2O. It crystallizes in an octahedral structure in neutral solution and cubic structure in an alkali solution with space group P a −3 and lattice parameter of 12.18 Å. The compound is the most important member of the generic class of compounds called alums, and is often called simply alum.
QuebecQuebec (k(w)ɪˈbɛk ; kwəˈbɛk ; Québec kebɛk) is one of the thirteen provinces and territories of Canada. It is the largest province by area and the second-largest by population. Much of the population of Quebec lives in urban areas along the St. Lawrence River, between its most populous city, Montreal, and the provincial capital, Quebec City. The province is the home of the Québécois nation.
MarseilleMarseille (mɑːrˈseɪ , maʁsɛj, maχˈsɛjə; also spelled in English as Marseilles) is the prefecture of the French department of Bouches-du-Rhône and capital of the Provence-Alpes-Côte d'Azur region. Situated in the Provence region of southern France, it is located on the coast of the Gulf of Lion, part of the Mediterranean Sea, near the mouth of the Rhône river. Its occupants are called Marseillais.. Marseille is the second most populous city in France, with 870,321 inhabitants in 2020 (Jan.
LoméLomé (UKˈloʊmeɪ , USloʊˈmeɪ ) is the capital and largest city of Togo. It has an urban population of 837,437 while there were 1,477,660 permanent residents in its metropolitan area as of the 2010 census. Located on the Gulf of Guinea at the southwest corner of the country, with its entire western border along the easternmost point of Ghana's Volta Region, Lomé is the country's administrative and industrial center, which includes an oil refinery. It is also the country's chief port, from where it exports coffee, cocoa, copra, and oil palm kernels.
LabradorLabrador (ˈlæbrədɔːr ) is a geographic and cultural region within the Canadian province of Newfoundland and Labrador. It is the primarily continental portion of the province and constitutes 71% of the province's area but is home to only 6% of its population. It is separated from the island of Newfoundland by the Strait of Belle Isle. It is the largest and northernmost geographical region in the four Atlantic provinces. Labrador occupies most of the eastern part of the Labrador Peninsula.
