352 



ON THE FHUSSIC AND PRUSSOI'S ACIDS. 



TAbLE III. with Prussous Add. 



Action of the 

 prus.=ou5 acid 

 on earthy and 

 njctallic solu- 

 tions. 



CHEMICAL AGENTS. 



Muriate of lime 

 Muriate of barytes 

 Muriate of gold 

 Sulphate of silver 

 Nitrate of silver - 

 Prussicite of mercury 

 Nitrate of mercury - 

 Oxiniirate of mercury 



Oxisulphateof iron 

 Nitromuriate of platina 

 Nitrate of lead 



Oxinitrate of lead 



Hyperoxi muriate of lead 



Supersulphate of copper 



Muriate of bismuth "^ 



Nitrate of nickel I 



Muriate of tin | 



Nitrate of cobalt ) 



Sulphate of iron I 



Sulphate of manganese I 



Sulphate of zinc J 



No chnnge. 

 No change. 



The gold precipitated metallic. 

 Copious white precipitates. 

 No chang'*. 



Copious grayish white precipitate. 

 Very slight precipitate, white. 

 \ Solution turns blood-red, no precipi- 

 l tate. 

 No precipitate. 

 No change. 

 pSolution becomes red, but hardlv any 

 j precipitate formed, unless heated, 

 I in which case a copious white pre- 

 I cipitate ensues. The red colour dis- 

 'S appears, a rapid action takes place 

 between the two liquids, and some 

 of the nitric acid of the solution is 

 decomposed, 

 A slight precipitate, probably of mu^ 



riate of lead. 

 Solution becomes slightly turbid. 



No precipitates. 



KeadtGr process I Cannot conclude this part of my memoir without giving 

 for preparuig ^ more simple and expeditious process for preparing prussite 

 potash. of potash, than that which I at first discovered. It is the 



following. 



Pour a solution of prussiate of mercury into hidrogu- 

 rettcd sulphuret of potash, till the mutual decomposition 

 of the two liquids is completed ; prnssiate of potash is in- 

 stantly formed, and may be separated by filtration from the 

 solid combination of the sulphur and mercury. 

 Properties in I wish also to observe, that the proportion of Prussian 



the&rst process- |j|yg j jj^^e mentioned for boiling with the sulphuret is 

 much larger than is necessary, as I have since succeeded iu 

 obtaining prussiate of potash when the proportion of Pru?. 

 s>ian blue was only equal to that of the sulphuret, but long 



boiled 



