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hypophosphorous

hypophosphorous Sentence Examples

  • The metal can be reduced by magnesium, zinc, cadmium, iron, tin, copper and substances like hypophosphorous acid from acid solutions or from alkaline ones by formaldehyde.

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  • Wurtz's first published paper was on hypophosphorous acid (1842), and the continuation of his work on the acids of phosphorus (1845) resulted in the discovery of sulphophosphoric acid and phosphorus oxychloride, as well as of copper hydride.

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  • When finely divided it decomposes water giving hydrogen phosphide; it also reduces sulphurous and sulphuric' acids, and when boiled with water gives phosphine and hypophosphorous acid; when slowly oxidized under water it yields, hypophosphoric acid.

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  • Hypophosphorous acid, HP(OH) 2, discovered by Dulong in 1816, and obtained crystalline by Thomson in 1874 (Ber., 7, P. 994), is prepared in the form of its barium salt by warming phosphorus with baryta water, removing the excess of baryta by carbon dioxide, and crystallizing the filtrate.

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  • Rose; liquid phosphuretted hydrogen was first obtained by Thenard in 1838; and hypophosphorous acid was discovered by Dulong in 1816.

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  • The metal can be reduced by magnesium, zinc, cadmium, iron, tin, copper and substances like hypophosphorous acid from acid solutions or from alkaline ones by formaldehyde.

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  • The replacement is more readily brought about by the use of sodium stannite (P. Friedlander, Ber., 1889, 22, p. 587), or by the use of a concentrated solution of hypophosphorous acid (J.

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  • Cuprous hydride, (CuH) n, was first obtained by Wurtz in 1844, who treated a solution of copper sulphate with hypophosphorous acid, at a temperature not exceeding 70° C. According to E.

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  • Wurtz's first published paper was on hypophosphorous acid (1842), and the continuation of his work on the acids of phosphorus (1845) resulted in the discovery of sulphophosphoric acid and phosphorus oxychloride, as well as of copper hydride.

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  • When finely divided it decomposes water giving hydrogen phosphide; it also reduces sulphurous and sulphuric' acids, and when boiled with water gives phosphine and hypophosphorous acid; when slowly oxidized under water it yields, hypophosphoric acid.

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  • Phosphine may be prepared by the decomposition of calcium phosphide with water (P 2 H 4 being formed simultaneously); by the decomposition of phosphorous and hypophosphorous acids when strongly heated; and by the action of solutions of the caustic alkalis on phosphorus: P4+3NaOH+3H20= PH3+3NaH2P02; hydrogen and P 2 H 4 are produced at the same time, and the gas may be freed from the latter substance by passing into a hydrochloric acid solution of cuprous chloride, and heating the solution, when pure phosphine is liberated (Riban, Comptes rendus, 58, p. 581).

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  • Oxyacids.-Phosphorus forms several oxyacids: hypophosphorous acid, H 3 P0 2, and hypophosphoric acid, H 4 P 2 0 6 or H2P03, of which the anhydrides are unknown; phosphorous acid, H 3 P0 3, derived from P 4 0 5; monoperphosphoric acid, H 3 P0 5; perphosphoric acid, H4P208; and meta-, pyro-, and ortho-phosphoric acids, derived from P4010, for which see Phosphates.

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  • Hypophosphorous acid, HP(OH) 2, discovered by Dulong in 1816, and obtained crystalline by Thomson in 1874 (Ber., 7, P. 994), is prepared in the form of its barium salt by warming phosphorus with baryta water, removing the excess of baryta by carbon dioxide, and crystallizing the filtrate.

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  • Similarly phosphorous and hypophosphorous acids give phosphoric acid and phosphene, whilst nitrous acid gives nitric acid and nitric oxide: 4H3P03=3H3P04+PH3; 2H 3 PO 2 =H 3 PO 4 +PH 3 i 3HN02= HNO 3 +2NO--H20.

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