Ostwald may refer to: * Friedrich

Wilhelm Ostwald Wilhelm Friedrich Ostwald (; – 4 April 1932) was a Latvian chemist and philosopher. Ostwald is credited with being one of the founders of the field of physical chemistry, with Jacobus Henricus van 't Hoff, Walther Nernst and Svante Arrhenius. ...

, the physico-chemist (awarded the Nobel Prize in Chemistry, 1909) #

Ostwald's rule In materials science, Ostwald's rule or Ostwald's step rule, conceived by Wilhelm Ostwald, describes the formation of Polymorphism (materials science), polymorphs. The rule states that usually the less Chemical stability, stable polymorph crystalli ...

of polymorphism: in general, the least stable polymorph crystallizes first # The

Ostwald Process The Ostwald process is a chemical process used for making nitric acid (HNO3). The Ostwald process is a mainstay of the modern chemical industry, and it provides the main raw material for the most common type of fertilizer production. Historically a ...

, a synthesis method for making nitric acid from ammonia #

Ostwald ripening Ostwald ripening is a phenomenon observed in solid solutions and liquid sols that involves the change of an inhomogeneous structure over time, in that small crystals or sol particles first dissolve and then redeposit onto larger crystals or s ...

, a crystallization effect #

Ostwald color system In colorimetry, the Ostwald color system is a color space that was invented by the Baltic German chemist Wilhelm Ostwald. Associated wit''The Color Harmony Manual'' it comprises a set of paint chips representing the Ostwald color space. There ar ...

# Ostwald's

law of dilution Wilhelm Ostwald’s dilution law is a relationship proposed in 1888 between the dissociation constant ' and the degree of dissociation ' of a weak electrolyte. The law takes the form :K_d = \cfrac = \frac \cdot c_0 Where the square brackets de ...

* Wolfgang Ostwald, chemist and biologist, son of Friedrich Wilhelm Ostwald. He studied colloids *

Martin Ostwald Martin Ostwald (January 15, 1922 – April 10, 2010) was a German-American classical scholar, who taught until 1992 at Swarthmore College and the University of Pennsylvania. His main field of study was the political structures of ancient Greece. ...

, a German-American classical scholar * Ostwald (crater), a crater on the far side of the Moon * Ostwald, Bas-Rhin, a commune in the Bas-Rhin ''département'' in France

See also