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Aqueous solutions of nickel sulfate react with sodium carbonate to precipitate nickel carbonate, a precursor to nickel-based catalysts and pigments. [6] Addition of ammonium sulfate to concentrated aqueous solutions of nickel sulfate precipitates Ni(NH 4) 2 (SO 4) 2 ·6H 2 O. This blue-coloured solid is analogous to Mohr's salt, Fe(NH 4) 2 (SO ...
The first periodatonickalates discovered were sodium nickel periodate (NaNiIO 6 ·0.5H 2 O) and potassium nickel periodate (KNiIO 6 ·0.5H 2 O). P. P. Ray and B. Sarma obtained these dark purple double salts in 1949, mixing nickel sulfate with potassium or sodium periodate and (as oxidant) a boiling aqueous solution of an alkali persulfate ...
As a mineral the ammonium nickel salt, (NH 4) 2 Ni(SO 4) 2 · 6 H 2 O, can be called nickelboussingaultite. [2] With sodium, the double sulfate is nickelblödite Na 2 Ni(SO 4) 2 · 4 H 2 O from the blödite family. Nickel can be substituted by other divalent metals of similar sized to make mixtures that crystallise in the same form. [3]
Basic nickel carbonate, zaratite, with the formula Ni 4 CO 3 (OH) 6 (H 2 O) 4, is produced when alkali carbonates are added to a nickel solution. Nickel phosphate, Ni 3 (PO 4) 2 · 7 H 2 O is also insoluble. [1] A number of other phosphates have been made, including nanoporous substances resembling zeolites named with "Versailles Santa Barbara ...
Nickel carbonates are hydrolyzed upon contact with aqueous acids to give solutions containing the ion [Ni(H 2 O) 6] 2+, liberating water and carbon dioxide in the process. Calcining (heating to drive off CO 2 and water) of these carbonates gives nickel(II) oxide: NiCO 3 → NiO + CO 2. The nature of the resulting oxide depends on the nature of ...
The commercial success was achieved by Isaac Adams Jr., whose patent for a solution of nickel ammonium sulfate, while similar to Böttger's, had neutral pH that made the process easier to control. Adams enjoyed a near-monopoly in nickel plating from 1869 to 1886, when the consumption of nickel for plating reached 135 tons. [4]
Nickel maleate can be made from maleic acid and nickel carbonate in boiling water. A dihydrate crystallises from the water solution. [11] Nickel fumarate prepared from fumaric acid and nickel carbonate is pale green as a tetrahydrate, and mustard coloured as an anhydride. It decomposes when heated to 300° to 340° in vacuum.
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