Intelligence and Miscellaneous Articles. 235 



ON THE PREPARATION AND PROPERTIES OF CERTAIN CHLO- 

 RATES. BY M. ALEXANDER WAECHTER. 



Protochlorate of Iron. — A colourless neutral solution of this salt 

 is obtained by decomposing a solution of protosulphate of iron with 

 one of chlorate of barytes, both solutions being cold. This salt de- 

 composes spontaneously when the solution is not kept at a very low 

 temperature ; it then loses its neutrahty, precipitates basic perchlo- 

 ride of iron of a cinnamon colour, and there remains a deep red co- 

 loured solution of perchlorate and perchloride of iron. 



Protochloride of Tin. — Hydrated protoxide of tin, when recently 

 precipitated, dissolves in aqueous chloric acid, and forms a colourless 

 solution; this decomposes spontaneously in a few minutes with 

 strong detonation and increased temperature, yielding a gelatinous 

 mass when the decomposition is over ; this contains hydrated oxide 

 of tin, perchloride of tin and much free chloric acid. The detonation 

 arises from a decomposition of a portion of the chloric acid, produced 

 by the increase of temperature. 



Chlorate of Zinc. — The solution of this salt is obtained by the de- 

 composition of chlorate of barytes by means of sulphate of zinc ; by 

 evaporation over sulphuric acid a very deliquescent crystalline mass 

 was obtained, which was very soluble in alcohol; this melts at 140° 

 Fahr., and at a little higher temperature it yields chlorine, oxygen and 

 water ; and when the heat is sufficiently raised, pure oxide of zinc 

 remains. 



It yielded by analysis. 



Chloric acid . . 44-46 

 Oxide of zinc. . 23-72 



Water 31-82 



100- 



Chlorate of Nickel. — A solution of this salt was obtained by de- 

 composing chlorate of barytes with sulphate of nickel, and the solu- 

 tion yielded, by evaporation over sulphuric acid, very fine regular oc- 

 tahedrons, of a deep green colour, which very readily deliquesced in 

 the air and were very soluble in alcohol ; they melt in their water 

 of crystalUzation at 176° Fahr., and begin to decompose at 284°, 

 yielding water, chlorine and oxygen ; if the temperature be not raised 

 above 392°, a black mixture, a residue of peroxide and chloride of 

 nickel, remains, which at a low red heat assumes a yellowish-gray 

 colour, and is then a basic chloride of nickel. If it be heated to red- 

 ness for a long time, it is converted into pure oxide of nickel of a 

 silver-gray colour. 



The crystals of chloride of nickel were found to be composed of 

 Chloric acid . . 45-16 

 Oxide of nickel 22-50 



Water 32-34 



100- 

 Chlorate of Cobalt. — Chlorate of barytes was decomposed by sul- 

 phate of cobalt ; the solution, separated by the filter from the sul- 



