J7i OBSERVATIONS ON MURIATIC ACID. 



The byperox. And the elements of hyperoxigenized muriate of potato, fhould 



muriate there- be t J lus ft atec J . 

 lore contained 



nearly i part * Oxigen - 38,3 j hyperoxigenized 7 . „ 



common acid, Muriatic acid 20 ) muriatic acid \ " ' 



Uft3£. Potato - - 39,2 



igen. Water - - 2,5. 



100,0. 

 Muriates lofe a it may be obferved, that the 53,5 of the retort did not yield 

 ilition. ! tne * ame proportion of acid as the 5 of the tube and receiver. 



The fad is, that all muriates lofe a little of their acid at a red 

 heat, as I fliall prefently mention more particularly ; and the 

 fmall lofs was, in all probability, owing to a portion of acid dif- 

 engaged by the heat to which the fait was necefTarily expofed 

 during the operation. 

 To determine Having thus afcertained the proportion of oxigen in hyper- 



to convert mu- oxigenized muriatic acid, by means of its combination with 

 riatic intooxyg potafh, a ready method occurred to arrive at the knowledge of 

 that contained in oxigenized muriatic acid. For this purpofe, 

 I difpofed in the following manner, a Woulfe's apparatus, con- 

 Ming of three bottles, and connected with the pneumatic tub. 

 In the firft bottle, I put a folution of potafh *, in about fix parts 

 of water. In the fecond, a folution of the fame ; but fo dilute, 

 as that no part of the fait, which might be formed, (hould cryf- 

 Ox. mur. acid tallize during the operation. About twenty parts of water was 



gas was paffed in ° * . J r 



fucceffion the proportion there employed. In the third bottle, I put com- 



througb ftrong mon carbonate of potafh. Through this apparatus, I fent a 

 am" weak folu". current of oxigenized muriatic acid, difengaged by fulphuric 

 tion of potafh, acid, from a mixture of muriate of foda and black oxide of 

 carbonate of pot- manganefe, in the "well known manner. Cryftals of hyper- 

 afh. oxigenized muriate of potafh were formed in the liquor of the 



1 *WVtd ^"f 6 ^ r ^ bottle » anc *> as l° n S as tne y remained, I was certain, from 

 tals and de- previous experiment, that no fulphuric or muriatic acid could 

 tamed all the pafs into the fecond bottle. The current was continued, till 



fulph. or mur. ... ., , , , . . r r . , _,. 



acid. the liquor oi that bottle contained an excels or acid. 1 he car- 



The fecond hot- bonate of potalli, in the third bottle, abforbed the fuperabun- 

 hype^oxJmur! y ^ ant vapours ; and the pneumatic apparatus was ready' to 

 acid, and con- collect: any gafes that might be evolved. By thefe means, I 



tained its difTol-. 



ved combination _ ,__, m . J"-, ''•'. .. ' , ,. 



*rith potafh. Whenever potafh, foda, barytes, an acid, an alkali, water, or 



the names of o'ther fubftances are ufed without an epithet, they are 

 meant to denote them in that flate which is commonly called pure, 



obtained 



