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sodium sulfate

(Encyclopedia)sodium sulfate, chemical compound, Na2SO4. It is a white, orthorhombic crystalline compound at ordinary temperatures; above 100℃ it assumes a monoclinic structure, and above about 250℃ it assumes ...

Tempe

(Encyclopedia)Tempe tĕmˈpē [key], city (1990 pop. 141,865), Maricopa co., S Ariz., in the Salt River valley, a suburb of Phoenix; inc. 1894. Its population has grown markedly since the 1970s with the expansion o...

Red River, rivers, United States and Canada

(Encyclopedia)Red River. 1 River, 1,222 mi (1,967 km) long, southernmost of the large tributaries of the Mississippi River. It rises in two branches in the Texas Panhandle and flows SE between Texas and Oklahoma an...

ferric sulfate

(Encyclopedia)ferric sulfate or iron (III) sulfate, chemical compound, Fe2(SO4)3, a yellow rhombic crystalline hygroscopic water-soluble salt that decomposes when heated to a temperature of 480℃. The enneahydrate...

Midland, cities, United States

(Encyclopedia)Midland. 1 City (1990 pop. 38,053), seat of Midland co., central Mich., in the Saginaw valley at the confluence of the Tittabawassee and Chippewa rivers; inc. 1887. Midland owes its development after ...

Sankt Wolfgang

(Encyclopedia)Sankt Wolfgang vôlfˈgäng [key], town, Upper Austria prov., in the Salzkammergut, on the Wolfgang See, a lake. It is a popular resort, famous for the White Horse Inn. A noteworthy attraction is the ...

Västerås

(Encyclopedia)Västerås vĕsˌtərōsˈ [key], city (1990 pop. 98,303), capital of Västmanland co., E Sweden, a port on Lake Mälaren at the mouth of the Svartån River. It is the main center of the Swedish elect...

Yellowknife

(Encyclopedia)Yellowknife, city (1991 pop. 15,179), capital of the Northwest Territories, Canada, on the north shore of Great Slave Lake, at the mouth of the Yellowknife River. It is the largest city in the Northwe...

common-ion effect

(Encyclopedia)common-ion effect, decrease in solubility of an ionic salt, i.e., one that dissociates in solution into its ions, caused by the presence in solution of another solute that contains one of the same ion...

Erie Canal

(Encyclopedia)Erie Canal, artificial waterway, c.360 mi (580 km) long; connecting New York City with the Great Lakes via the Hudson River. Locks were built to overcome the 571-ft (174-m) difference between the leve...