f 238 OBSERVATIONS ON MURIATIC ACIO, 



Component parts To determine the proportions in calomel, I diflfolved 10(5 

 oi calomel. fffffa* of it in nitric acid. The phenomena of the fo'lution 

 have been fo accurately defcribed by Mr. Berthollet, that I 

 fliall not repeat them. I precipitated by nitrate of filver ; and 

 obtained a quantity of muriate of filver correfponding with 

 1 1,5 of muriatic acid. The oxide of mercury I obtained apart. 

 Therefore, calomel is com poled of, 



Oxide of mercury - - 88,5 



JVIuriatic acid • - «• 1 1,5 



[00,0. 



Calomel was To afecrfain the flate of oxidizement of the oxide in ca- 



Mr^fubUby I omeI > * io °k 10 ° grains, and boiled them with nitro-mu- 

 boiling in nitro-riatic acid ; then evaporated very flowly, and fublimed as 

 mur. acid, eva- a b ove ^he ca i orae i was totally converted into corrofive 



por. and tub!. J 



It had gained fublimate, and weighed 113. But 113 of corrofive fublimate 



weight, of contain 20,3 of muriatic acid, of which, 1 1,5 were originally 

 which, trom the . ' . -n 



former expts. in the calomel. The total addition of weight was 13. But 



the proportions the quantity of acid in thefe 13, amounts to 20,3 — 11,5 = 

 oxigen were 8 > 8 * Therefore, 13 — 8,8 = 4,2, remain for that part of the 

 known j additional weight which is oxigen. On the other hand, 



100 of calomel contain the the fame quantity of mercury as 

 whence the pro- 1 1 3 of corrofive fublimate, =79. Thefe 79, with 11,5 of 

 portion of oxi- ac ^ are equa j to 90 5 anc j i eave 95 f or t j ie quantity of oxi- 

 gen in the oxide . , . , . T , , r ,, r 



is deduced, viz. gen contained in calomel. It would appear, trom thele 

 10.7 per cent, experiments, that corrofive fublimate contains 6,5 per cent, 

 more acid, and but 2,8 per cent, more oxigen, than calomel. 

 But this quantity of oxigen is combined with a much greater 

 proportion of mercury; and forms an oxide of a very differ- 

 ent degree of oxidizement. For, 88,5 : 9,5 : : 100 : 10,7. 

 Therefore, we may eftablith the following comparative 

 table :~ 



CALOMEL, 



