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Freeplay (French: jeu libre) is a literary concept from Jacques Derrida's 1966 essay, "Structure, Sign, and Play in the Discourse of the Human Sciences". In his essay, Derrida speaks of a philosophical "event" that has occurred to the historic foundation of structure. Before the "event", man was the center of all things.
Structure, Sign, and Play in the Discourse of the Human Sciences" (French: La structure, le signe et le jeu dans le discours des sciences humaines) was a lecture presented at Johns Hopkins University on 21 October 1966 by philosopher Jacques Derrida.
Indeed, many molecules behave as acids in non-aqueous solutions but not in aqueous solutions. An extreme case occurs with carbon acids, where a proton is extracted from a C−H bond. [12] Some non-aqueous solvents can behave as acids. An acidic solvent will make dissolved substances more basic.
HSAB is an acronym for "hard and soft (Lewis) acids and bases".HSAB is widely used in chemistry for explaining the stability of compounds, reaction mechanisms and pathways. It assigns the terms 'hard' or 'soft', and 'acid' or 'base' to chemical species.
Huizinga attempts to classify the words used for play in a variety of natural languages. The chapter title uses "play-concept" to describe such words. Other words used with the "play-" prefix are play-function and play-form. The order in which examples are given in natural languages is as follows: Greek [14] (3)
In chemistry, an acid–base reaction is a chemical reaction that occurs between an acid and a base.It can be used to determine pH via titration.Several theoretical frameworks provide alternative conceptions of the reaction mechanisms and their application in solving related problems; these are called the acid–base theories, for example, Brønsted–Lowry acid–base theory.
One use of conjugate acids and bases lies in buffering systems, which include a buffer solution. In a buffer, a weak acid and its conjugate base (in the form of a salt), or a weak base and its conjugate acid, are used in order to limit the pH change during a titration process. Buffers have both organic and non-organic chemical applications.
Note: in dilute aqueous solution the formation of the hydronium ion, H 3 O + (aq), is effectively complete, so that hydration of the proton can be ignored in relation to the equilibria. Other examples of inorganic polyprotic acids include anions of sulfuric acid , phosphoric acid and hydrogen sulfide that have lost one or more protons.