COMBINATIOKS OF OXIMURIATIC ACID ANl) MEtALS. 13 



ture not much above 400 of Fahrenheit, the deliq-aescent 

 muriate of copper. Thus made, it has the same appearance 

 and the same properties, as when directly fornned. It is of a 

 yellow colour, and pulverulent. Exposed to the atmosphere, 

 it is converted, by the action and absorption of water, into 

 the deliquescent muriate; and its colour, during this altera- 

 tion, changes from yellow first to white, and lastly to green. 

 It is decomposed by heat; and even in chtorinegas when the 

 experiment is made on a pretty large quantity, part of the 

 chlorine is expelled, and assumes the gaseous state, and cu- 

 pran€ remains. 



I have employed the same methods for ascertaining the Component 

 proportions of the constituent parts of both these coinbma- a^eaa^'!^^ 

 lions. I have separated the copper by iron, and the chlorine 

 by means of nitrate of silver. 



A solution of 80 grains of cuprane in nitro-muriatic acid, lstcompou»a, 

 precipitated by iron, afforded 51 "2 grains of copper, well 

 washed, and perfectly dried. 



A solution of the same quantity of cuprane in nitric acid, ' 

 precipitated by nitrate of silver, afforded 117'5 grains of 

 horn silver, dried till it ceased to suffer any loss of weight by- 

 exposure to a temperature above 500 Fahrenheit. 



Since horn silver contains 24*5 per cent of chlorine*, 80 

 grains of cuprane appear to contain 51*2 grains of copper 

 and 28*8 of chlorine. And 100 appear to consist of 



36 chlorine Component 



64 copper pa'ts. 



100 



A solution of 40 grains of cupranea in water, acidulated 2d oomponade 

 V?ith muriatic acid, precipitated by iron afforded 18*8 grains 

 •f copper. 



And a solution of 20 grains of cupranea in water, precipi- 

 tated by nitrate of silver, afforded 43 grains of horn silver. 



* This I have ascertained by synthesis; 12 grains of pure silver Componeirt 

 dissolved in nitric acid, and precipitated %vith muriate of ammonia, parts of horn 

 yielded 15'9 grains of fused horn silver. 1 do !;ot give the particulars ^"'^'^* 

 of the experiment, which was very carefully made; because the result 

 very nearly agrees with that of Kiaproth, and of other chemists. 



Hence 



