Potassium mercuric ferrocyanide

Potassium Chlorate. .. Potassium Triiodo Mercurate(ll) Potassium Chloride Potassium Chlorate Potassium Chromate Potassium Cyanide Potassium Dichromate Potassium Ferricyanide Potassium Ferrocyanide Potassium Fluoride Potassium Formate Potassium Hydride Potassium Hydrogen Phthalate Potassium Hydroxide Potassium lodate... 

A series of stable salts has been prepared 8 containing mercuric cyanide associated with the ferrocyanide molecule. The first to be discovered was the potassium salt, K4Fe(CN)6.3Hg(CN)2.4H20, by Kane,7 which is readily obtained by allowing a mixed solution of potassium ferrocyanide and mercuric cyanide to evaporate. Other salts in this series are those of... 

Potassium mercuric ferrocyanide, K2HgFe(CN)6, may be obtained as a faintly blue powder by the interaction of mercuric chloride and potassium ferrocyanide solutions.4 It is insoluble in water, but is decomposed by acids. 

Fbrric—Are acid, and yellow or brown. (1.) Potash, or ammonium hydroxid voluminous, red-brown ppt. insoluble in excess. (2.) Hydrogen sulfid in acid solution milky ppt. of sulfur ferric reduced to ferrous compound. (8.) Ammonium sulfhydrate black ppt. insoluble in excess soluble in acids. (4.) Potassium ferrocyanid dark blue ppt. insoluble in HCl sohible in KHO. <5.) Potassium sulfocyanate dark-red color prevented by tartaric or citric acid discharged by mercuric chlorid. (6.) Tannin blue-black color. 

White precipitates are formed when a 1% solution of cusparine is treated with phosphotungstic, phosphomolybdic or tannic acids, or with mercuric chloride or potassium mercuri-iodide. Picric acid, platinic chloride or potassium chromate give yellow precipitates, auric chloride or potassium bismuth iodide brown, and potassium ferrocyanide bluish-white (36). By treating a solution of cusparine hydrobromide with bromine water, a series of bromocusparine polybromides is obtiuned(38). 

Iron percfiloride and potassium sulphocyanide give a blood-red, decolourized by mercuric chloride potassium sulphocyanide and sulphuric acid a fine old port colour, cleared by the same agent Litmus solution and an acid produce red, also permanganate of potash and sulphuric acid, cleared by hyposulphite of soda. Potassium ferrocyanide and the double sulphate of uranium and potassium give an old port-like colour-washing soda clears it. 

Occluded hydrogen is more reactive chemically than the normal gas. Hydrogenated palladium precipitates mercury and mercurous chloride from an aqueous solution of the dichloride, without any evolution of hydrogen. It reduces ferric salts to ferrous potassium ferricyanide to ferrocyanide chlorine water to hydrochloric add iodine water to hydriodic acid 2 chromates to chromic salts ceric to cerous salts whilst cupric, stannic, arsenic, manganic, vanadic, and molybdic compounds are also partially reduced.3... 

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