Nitrate cadmium

TABLE 2-51 Copper Sulfate TABLE 2-52 Cuprous (CuS04) Chloride (CuCI2)  

---

Eor the negative electrolyte, cadmium nitrate solution (density 1.8 g/mL) is used in the procedure described above. Because a small (3 —4 g/L) amount of free nitric acid is desirable in the impregnation solution, the addition of a corrosion inhibitor prevents excessive contamination of the solution with nickel from the sintered mass (see Corrosion and corrosion inhibitorsCorrosion and corrosion control). In most appHcations for sintered nickel electrodes the optimum positive electrode performance is achieved when one-third to one-half of the pore volume is filled with active material. The negative electrode optimum has one-half of its pore volume filled with active material. 

Cadmium Hydroxide. Cd(OH)2 [21041-95-2] is best prepared by addition of cadmium nitrate solution to a boiling solution of sodium or potassium hydroxide. The crystals adopt the layered stmcture of Cdl2 there is contact between hydroxide ions of adjacent layers. Cd(OH)2 can be dehydrated to the oxide by gende heating to 200°C it absorbs CO2 from the air forming the basic carbonate. It is soluble ia dilute acids and solutions of ammonium ions, ferric chloride, alkah haUdes, cyanides, and thiocyanates forming complex ions. 

Cadmium Nitrate. Anhydrous Cd(N02)2 [10325-94-7] is obtained by action ofnitric acid on the carbonate to give cadmium nitrate... 

Cadmium nitrate is the preferred starting material for Cd(OH)2 for use as the anode ia alkaline batteries. The siatered anode matrix of such batteries is saturated with cadmium nitrate (480—500 g/L Cd) and cadmium hydroxide is formed thereia by standardized electrolysis and dryiag (37). The tetrahydrate sells for 29.10/kg ia 20 kg lots. Other uses iaclude photographic emulsions and as a colorant ia glass and ceramics. 

Chemical Designations - Synonyms Cadmium Nitrate Tetrahydrate Chemical Formula Cd(N03)2 4HjO. 

Candelaria L.M., Chang A.C. Cadmium activities, solution speciation, and solid phase distribution of Cd in cadmium nitrate and sewage sludge-treated soil systems. Soil Sci 1997 162 (10) 722-732. 

Akmal M, Xu JM, Li ZJ, Wang HZ, Yao HY (2005a) Effects of lead and cadmium nitrate on biomass and substrate utilization pattern of soil microbial communities. Chemosphere 60 508-514... 

In a galvanic cell, one half-cell has a cadmium electrode in a 1 mol/L solution of cadmium nitrate. The other half-cell has a magnesium electrode in a 1 mol/L solution of magnesium nitrate. Write the shorthand representation. 

The reaction of monosodium salt of adenosine-5 -monophosphoric acid (19E) (AMP) with cadmium nitrate in the presence of nitric acid formed a binuclear... 

Also, the compound may be prepared by treating cadmium nitrate with acetic anhydride. 

Cadmium cyanide may be prepared by treating a concentrated aqueous solution of cadmium chloride or cadmium nitrate with potassium cyanide or sodium cyanide. The white precipitate obtained is filtered, washed and dried. 

Reactions with mineral acids produce their cadmium salts. With hydrochloric acid, sulfuric acid and nitric acid, the products are cadmium chloride, cadmium sulfate and cadmium nitrate, respectively ... 

Cadmium nitrate is used for coloring glass and porcelain (historically) as a flash powder in photography and in the manufacture of many other cadmium salts. 

Cadmium nitrate is prepared by dissolving cadmium metal or its oxide, hydroxide, or carbonate, in nitric acid followed by crystallization ... 

When mixed with caustic soda solution, cadmium oxide forms precipitate of cadmium hydroxide. Many insoluble cadmium salts are obtained by such precipitation reactions. For example, mixing aqueous solutions of cadmium nitrate with ammonium tungstate results in precipitation of cadmium tungstate. 

Elemental composition Cd 47.55%, N 11.85%, O 40.60%. The metal may be analyzed in its acidified aqueous solution by various instrumental techniques (see Cadmium). Nitrate ion in the aqueous solution may be determined by ion chromatography or by using a nitrate ion-selective electrode. 

Cadmium nitrate is moderately toxic by ingestion, and possibly other routes of exposure. 

Similar thermal decomposition of cadmium nitrate or sulfate would yield the oxide. 

Cadmium sulfide may be prepared by precipitation from an aqueous solution of its soluble salts such as cadmium chloride or cadmium nitrate by passing hydrogen sulfide. The reactions may he carried out in acidic, neutral or alkaline solutions using various cadmium salts to obtain different crystal modifications as shown in the table below. 

---