30 1*. T. CL EVE, 



18. Double Sulphite of barium Rv ' s0 ' fBa+3H 2 



19. Double Sulphite of manganese R{ 0S0 ' /Mn+4H 2 



20. Double Sulphite of zinc Rj°;'^ ^Zn+öH^O 



21. Double Sulphite of nickel R{°gJJ;°}Ni+7H 2 



22. Double Sulphite of cobalt R{°;;!°;°}Co+6H 2 



23. Double Sulphite of uranyl R{°;a°;°}U a 0^+21^0 



24. Double Sulphite of copper R{°; f £}Cu+5H 2 



25. Double Sulphite of lead R{° ™° }Pb+H 2 



26. Anhydride RO? 



E. COMPOUNDS OF PLATINAMMINE. 



IV 



INH, 



ra, 



(Cl 



K=PC 



|nh 

 1. Chloride Pt{ NH 3 cl was prepared by Geruardt 1 ) by uniting the chloride of 



Ici 3 ' 



platosammine with chlorine. As a modification of the method the chloride may easily 



be obtained by boiling the chloride of platosammine with nitro-muriatic acid or with 



permanganate of potassium and hydrochloric acid. It is easily purihed by recrystalli- 



sation from its boiling solution. The chloride is a bright glittering powder of a clear 



lemon-colour. It is composed of small quadratic octahedrons, generally well develo- 



ped and truncated by quadratic faces. It dissolves Avith difficulty in cold water and 



according to my experiments 1 part of the chloride requires about 700 parts water of 



0° for its solution. In böiling water it is far more soluble and requires only 33 or 



34 parts water of 100° for solution. The chloride does not contain water, and, when 



heated, it slowly begins to decompose at 200° — 216°. 



Analysis : 

 0,5047 gr. gave 0,2054 gr metallic platinum and 0,777 gr. chloride of silver =0,1921 

 gr. chlorine. 



Calculated Found by Gerhardt 



Platinum 197,88 — 52,^5 52,58 52,67 52,88 



Chlorine 141,84—37,% 38,06 38,09 



Nitrogen 28,oo— 7,49 7,4S 



Hydrogen 6,oo — 1,60 1,77 



373,72 100,oo 99,96 



') Ann. de- Ch. u. Pharm. 76. 1850. p. 308. 



