Potassium Tungstocyanide, K₄[W(CN)₈]

Potassium Tungstocyanide, K₄[W(CN)₈].2H₂O, may be prepared by the action of potassium carbonate on the cadmium salt, or by treating a solution of potassium tungsten chloride, K₃W₂Cl₉, with potassium cyanide. It yields light yellow microscopic prisms, which lose all their water at 115° C. According to Olsson, 10 c.c. of water dissolve 13 to 14 grams of the salt at 18° C. The electrical conductivities of solutions containing one equivalent in v litres at 25° C. have been determined as follows

v =	32	64	128	256	512	1024
Λ =	118.8	130.0	140.6	149.5	159.8	165.8