Calcium nitrate.dihydrate

C2H60 ETHANOL 388 Ca(N03)2 2H20 CALCIUM NITRATE DIHYDRATE 438... 

Zhang, Y. and Muhammed, M. Solubility of calcium sulfate dihydrate in nitric acid solutions containing calcium nitrate and phosphoric acid, J. Chem. Eng. Data, 34(1) 121-124, 1989. 

Calcium sulphate dihydrate (microscope) test This is an excellent confirmatory test for calcium in Group IV it involves the use of a microscope (magnification about 110 x). The salts should preferably be present as nitrates. 

The dihydrate is formed by evaporation at ordinary temperature of an ethereal solution of the hexahydrate which has been dried with calcium nitrate or by crystallisation of the hexahydrate from concentrated nitric acid solution. It yields small lustrous plates, thick and square, probably rhombic, and possessing a green fluorescence. It melts at 179-3° C. It is much more stable than the trihydrate, and can be kept in a vacuum desiccator with caustic alkali or i hosphorus pentoxide without any loss of water. It dissolves readily in ether. If the dihydrate is heated in a current of carbon dio.xide at 98° C. a product corresponding very nearly in composition to the nioiiohydrate, U03(N03)3.H20, is obtained at 160° C. under the same conditions the ankydi ffus salt, U02(N03)2, is obtained. The latter may also be obtained by passing a current of dry nitric anhydride over the tri-hydrate carefully heated at 170° to 180° C. It is a yellow amorphous powder, readily soluble in water with c -olution of heat. It reacts violently with ether. When heated to 200° C. it decomposes and leaves a mixture of uranic acid, UO3.H2O, and uranic anhydride. ... 

Calcium sulfate dihydrate glaze/ceramics ingredient Copper nitrate (ic)... 

Jones and Tarter [11] have applied this technique to the simultaneous determination of metals (sodium, potassium, calcium, magnesium) and anions (chloride, sulphate, nitrate, bromide) in potable waters. The technique uses a cation separator column, a conductivity detector, an anion separator column and an anion suppressor column. Two different eluants were used lithium carbonate-lithium acetate dihydrate, and copper phthalate. 

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