perchloric acid

per·chlo·ric acid

P0183400 (pər-klôr′ĭk)n. A colorless, corrosive liquid, HClO₄, explosively unstable under some conditions, that is a powerful oxidant used as a catalyst and in explosives.

perchloric acid

(pəˈklɔːrɪk) n (Elements & Compounds) a colourless syrupy oxyacid of chlorine containing a greater proportion of oxygen than chloric acid. It is a powerful oxidizing agent and is used as a laboratory reagent. Formula: HClO4. Systematic name: chloric(VII) acid

per·chlo·ric acid

(pər-klôr′ĭk) A clear, colorless liquid, HClO₄, that is very corrosive and, under some conditions, extremely explosive. It is a powerful oxidant and is used as a catalyst and in explosives.

Thesaurus

Noun

perchloric acid - a powerful oxidizing agent; forms perchloratesacid - any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

Translations

Perchloric Acid

perchloric acid

[pər′klȯr·ik ′as·əd] (inorganic chemistry) HClO₄ Strongly oxidizing, corrosive, colorless, hygroscopic liquid, boiling at 16°C (8 mmHg, or 1067 pascals); soluble in water; unstable in pure form, but stable when diluted in water; used in medicine, electrolytic baths, electropolishing, explosives, and analytical chemistry, and as a chemical intermediate. Also known as Fraude's reagent.

Perchloric Acid

HClO₄ a monobasic acid in which the chlorine has an oxidation number of + 7. Anhydrous perchloric acid is a colorless mobile liquid, which fumes in the air; it has a density of 1.761 g/cm³ at 20°C, a melting point of – 102°C, and a boiling point of 110°C. Perchloric acid is one of the strongest inorganic acids; its corresponding salts are the perchlorates (seePERCHLORATE). Anhydrous perchloric acid is very reactive and unstable. With water it forms a series of hydrates HClO₄ · nH₂O, where n = 0.25 to 4. Aqueous solutions of perchloric acid are stable and have a low oxidizing capability. With water, perchloric acid forms an azeotropic mixture, which boils at 203°C and contains 72 percent HClO₄.

Aqueous solutions of perchloric acid are produced by the electrochemical oxidation of hydrochloric acid or chlorine dissolved in strong perchloric acid or by the exchange decomposition of sodium perchlorate or potassium perchlorate by strong inorganic acids. Concentrated aqueous solutions of perchloric acid are widely used in analytical chemistry, as well as in the production of perchlorates.

Anhydrous perchloric acid is produced by the interaction of sodium perchlorate or potassium perchlorate with strong sulfuric acid or by the interaction of aqueous solutions of perchloric acid with oleum (fuming sulfuric acid). It cannot be stored for long periods or transported long distances, since it decomposes slowly under ordinary conditions, becomes colored by the chlorine oxides formed during its decomposition, and may explode spontaneously.

Perchloric acid is used in the separation of complex ores and the analysis of minerals; it is also used as a catalyst.

REFERENCES

Rosolovskii, V. la. Khimiia bezvodnoi khlornoi kisloty. Moscow, 1966.
Iakimenko, L. M. Proizvodstvo khlora, kausticheskoi sody i neorganicheskikh khlorproduktov. Moscow, 1974.
Iakimenko, L. M., and M. I. Pasmanik. Spravochnik po proizvodstvu khlora, kausticheskoi sody i osnovnykh khlorproduktov, 2nd ed. Moscow, 1976.

L. M. IAKIMENKO

perchloric acid

per·chlo·ric acid

perchloric acid

per·chlo·ric acid

Perchloric Acid

perchloric acid

Perchloric Acid

REFERENCES

perchloric acid

perchloric acid

perchloric acid

Words related to perchloric acid

noun a powerful oxidizing agent

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