Hydrogen arsenate

Lead glance Lead glass Lead heat stabilizers Lead hydrogen arsenate Lead hydroxide... 

Hydrocarbons C26 5s, aromatic-rich Lead hydrogen arsenate 2-Methylaziridine... 

Synonyms Arsenic hydride, arseniurretted hydrogen arsenous hydride hydrogen arsenide... 

ARSINE AND DERIVATIVES Arsine (Hydrogen Arsenide Arseniuretted Hydrogen Arsenic Hydride or Trihydride) (Arsenwasserstoff in Ger), AsIJ3, mw 77.93 coi gas with offensive odor resembling that of garlic sp gr 2.695 (Air = 1.0) fr p 113.5° ... 

The first commercially successfull synthetic nacreous pigments were hexagonal platelet crystals of lead salts Thiosulfate, hydrogen phosphate, hydrogen arsenate and most important nowadays, basic carbonate. Basic lead carbonate [1319-46-6] Pb(OH2) 2PbC03, Mr 775.7, is precipitated from aqueous lead acetate or lead propionate solutions with carbon dioxide ... 

The addition of sodium monohydrogen arsenate to a solution of an aluminium salt results in the precipitation of a white powder which is probably aluminium hydrogen arsenate,5 Al2(HAs04)3. The powder dissolves in acids and the solution in hydrochloric acid when boiled with ammonium sulphite yields a precipitate of aluminium hydroxide, the arsenic remaining in solution. When heated in a current of hydrogen, arsenic is volatilised.6... 

Barium Arsenates.—Barium orthoarsenate, Ba3(As04)2, is formed as large colourless plates when a mixture of barium oxide, alkali chloride and alkali hydrogen orthoarsenate is fused and allowed to cool.6 It is also said to be formed7 by the action of ammonia on an aqueous solution of barium hydrogen arsenate the product, however, varies in composition, barium ammonium arsenate sometimes being formed and... 

Cadmium Arsenates.—The hydrated normal cadmium orthoarsenate, 2Cd3(As04)2.3H20, falls as a white voluminous precipitate on adding alkali to a solution of cadmium mono- or di-hydrogen arsenate in hydrochloric acid,4 or on addition of sodium orthoarsenate to a solution of cadmium sulphate.5 On drying at 100° C. the anhydrous salt remains. 

Ferrous Hydrogen Orthoarsenates have not been prepared in the pure state. According to Wittstein,8 the dihydrogen arsenate remains in the mother liquor when the normal orthoarsenate is precipitated (see equation above) and when iron is acted upon by arsenic acid over a long period an asbestos-like deposit is formed which probably contains a ferrous hydrogen arsenate.9... 

Basic mercuric sulphate is converted into mercuric orthoarsenate and mercuric oxide by warming with sodium mono hydrogen arsenate solution. Hot acetic acid will extract the oxide.5... 

The property of adherence of dusts to the plants determines their effectiveness. It varies considerably with composition, lead hydrogen arsenate adhering to a greater extent than magnesium arsenate and this more than calcium arsenate. The presence of slaked lime reduces the adherence.2 The air condition at the time of dusting also has an effect, the adhesion decreasing with increased wind velocity.3... 

If a soap is added to a lead hydrogen arsenate-hydrated ferric oxide mixture considerable damage and leaf drop is caused, especially if the soap contains a strong base, as in the case of commercial potash fish-oil soap or potassium oleate. Laboratory tests show that more soluble arsenic is formed than with a soap of a weak base such as triethanolamine oleate.7 The addition of cryolite to an arsenate inhibits the formation of soluble arsenic 8 fluosilicates cause decomposition. These fluorine... 

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