PALLADIUM. 467 



i 



This solution is precipitated by potash in dark 

 red flocks ; by ammonia in buff coloured flocks. 

 The precipitate by potash readily dissolves in 

 nitric acid ; but the ammoniacal precipitate does 

 not dissolve in that acid till the action of the 

 acid is assisted by heat. Gallic acid gives the 

 liquid a greenish brown colour, but occasions no 

 immediate precipitate ; prussiate of potash throws 

 down reddish brown flocks, but the solution is 

 not rendered colourless. 



Muriate of palladium has a reddish brown co- 

 lour. It does not crystallize ; its taste is in- 

 tensely astringent. When the dry salt is expos- 

 ed to the air, it becomes moist on the surface, 

 but does not flow into a liquid. This salt dis- 

 solves readily in water. 



2. I dissolved 7 grains of palladium in muria- Potash mu- 

 tic acid (assisted by a little nitric acid). To the iadium. P 

 solution I added a quantity of carbonate of pot- 

 ash, which I knew to contain exactly 6 grains of 

 potash. This solution being evaporated, yielded 

 crystals of triple muriate of palladium and pot- 

 ash to the very last drop. This experiment 

 shows, that in the triple salt the palladium bears 



to the potash the ratio of 7 to 6. 



3. Berzelius has given us the result of two * id f. * 



m . palladium. 



experiments which he made with palladium. 

 He oxydized 100 parts of palladium, by heating 

 them in a platinum crucible, with some potash 

 and nitre ; the oxide weighed 114'209 parts. 



G 2 



