Thorium bromate

P. T. Cleve 133 prepared thorium chlorate by double decomposition of barium chlorate and thorium sulphate, followed by evaporation under reduced press. The resulting soap-like deliquescent mass is very soluble in water. Thorium bromate behaved similarly. 

Cerous iodates and the iodates of the other rare earths form crystalline salts sparingly soluble in water, but readily soluble in cone, nitric acid, and in this respect differ from the ceric, zirconium, and thorium iodates, which are almost insoluble in nitric acid when an excess of a soluble iodate is present. It may also be noted that cerium alone of all the rare earth elements is oxidized to a higher valence by potassium bromate in nitric acid soln. The iodates of the rare earths are precipitated by adding an alkali iodate to the rare earth salts, and the fact that the rare earth iodates are soluble in nitric acid, and the solubility increases as the electro-positive character of the element increases, while thorium iodate is insoluble in nitric acid, allows the method to be used for the separation of these elements. Trihydrated erbium iodate, Er(I03)3.3H20, and trihydrated yttrium iodate, Yt(I03)3.3H20,... 

Write the formulas for the following ionic compounds (a) lithium hydride (b) calcium bromate (c)chromium(II) oxide id) thorium(IV) perchlorate (e) nickel phosphate if) zinc sulfate. 

EXPLOSION and FIRE CONCERNS combustible solid NFPA rating (NA) reacts to form explosive products with metal amides contact with acids may cause formation of poisonous hydrogen selenide gas incompatible or reacts violently with barium carbide, bromine pen-tafluoride, chromic oxide, fluorine, lithium carbide, lithium silicon, metals, nickel, sodium, nitric acid, nitrogen trichloride, oxygen, potassium, potassium bromate, rubidium carbide, zinc, silver bromate, uranium, strontium carbide, and thorium carbide toxic gases and vapors may be released in a fire involving selenium, sodium selenite, sodium selenate, and selenium dioxide use water for firefighting purposes. 

AfG°/Rr(ThBr03 )= -280.981 (fitted from this data), (a) Changes in HD as a function of bromate ion concentrations, (b) Changes in thorium concentrations as a function of bromate ion concentrations the solid line depicts predicted total thorium concentration and the other lines depict predicted concentrations of different thorium species as marked. 

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