£30 OBSERVATIONS ON MtfitlAflC ACjb. 



The filver muftfeparated by expelling the acid. The only condition abfq^ 



coppw.^ " 1 IuteI ^ nec€?u " ar y is > that the fiIver employed be free from cop- 

 per. For, in preparing phofphate of iilver by phofphate of 

 foda, and by nitrate of filver thus impure, copper would be 

 thrown down by the phofphoric acid ; and the phofphate of 

 copper would be afterwards decomposed by muriate of lime. 

 Muriate of copper would therefore remain with tjie earthy 

 hyperoxigenized muriates ; or, what is Hill worfe, a part of 

 the muriatic acid being eaiily expelled from oxide of copper, 

 the hyperoxigenized muriatic acid would be driven off from 

 Properties of the its bafts, by the more powerful agency of the former. This 

 cnur/ • ' fak nas a ^ tne properties enumerated as belonging to the ge» 

 nus of hyperoxigenized muriates; and, with heat, the acid is 

 expelled by all acids above the benzoic. I had hoped that, 

 without diftillation, I could procure the acid from the fait by 

 means of fulphuric acid, which would have left an infoluble 

 fait with barites ; but hyperoxigenized muriatic acid is fo eaiily 

 decompofed by light, that I have not yet obtained it, to my 

 «mit light more fetisfa&ion, difengaged and pure. A fact well worthy of at- 

 thofe with alk. Mention is that the ftronger acids difengage this acid with a 

 bafis. fl a fli of light, more frequently from the earthy than from the 



alkaline hyperoxigenized muriates ; a phenomenon which, I 

 fuppofe, depends upon the relative proportionate affinities, 

 and consequently the greater rapidity of the difengagement # 

 But, where all is hypothecs, it is ufelefs to draw any inference 

 from a iingle fa6t. 

 Component The proportions of this fait are, 



mar!' bantes*' Hyperoxigenized muriatic acid 47 



Barites - - - - - * - 42,2 

 Water „--«„- 10,8 



100,0 



Hyp. ox. mur. Fourth Species. Hyperoxigenized Muriate of Strontia. 



ihontia. m 



The foregoing obfervations apply to the formation of this 



fait, to the mode of obtaining it pure by phofphate of filver, 

 to its conduct with the acids, to the rank of its acid in the or- 

 Dellqiiefcent, der of affinities, and to its other properties. It is deliquef- 

 Weinalcohol" cent J and more foluble in alcohol than muriate of ftroritia. It 

 than the mu* melts in the mouth immediately, and produces cold. Its cry- 

 * utc# ftals aflume the fhape of needles. 



It 



