30 



ANIMAL ACIDS CONTAINING AZOTE 



5. Cyanet of mercury, C 2 Az -4- Hg 15-75. 



6. Cyanet of silver, C 2 Az -f Ag = 1675. 



7. Cyanet of palladium, C 2 Az -f Pa = 10- 



8. Cyanet of gold, C 2 Az -f 2 (Au) = 28-25. And so 



of the other cyanets. 



1. Ferrocyanogen, 3 (C 2 Az) + Fe = 13-25. 



Symbol for ferrocyanogen Cfy. 



2. Ferro-cyanhydric acid Cfy + H 2 = 13.5. 



Ferro-prussic or Ferro-chyazic acid of Porret. 



3. Ferrocyanet of potassium, Cfy -f 2 K = 23.28. 



Prussiate of potash. But it contains also three atoms water. 



r *} F i 



4. Ferrocyanet of potassium and iron, 2 Cfy -f < ^ V = 35. 



5. Prussian blue, 3 Cfy -f^Fe 2 43.25. 



6. Basic prussian blue, 3 Cfy -f 1 2 J^f |-f FeO 1 * 54*75. 



7. Soluble prussian blue, 2 Cfy -f | ^ j 38-5. 



8. Ferrocyanet of zinc and potassium, 2 Cfy + 1 3 ^ n | -41-875 



9. Ferrocyanet of ammonium, Cfy + 2 (Az H 4 ) -f- 3Aq = 



17-625. 



10. Ferrocyanet of sodium, Cfy -f 2 N -f- 12 Aq = 32-75. And 



so of the other ferrocyanets. 



11. Ferocyanet of potassium and calcium, Cfy + j p , >=20-75. 



12. Ferrocyanet of potassium andiron, 2 Cfy -f < ^ >=42 



This is the greenish white precipitate which falls when a solu- 

 tion of protoxide of iron is mixed with prussiate of potash. 



13. Basic cyanodide of iron, 3 Cfy + ||Q?| } = 58-25 



The preceding salt washed and then dissolved in water : 



1. Ferricyanogen, 2 Cfy = 26-5. 



The supposed basis of Gm elm's red prussiate of potash : 



2. Ferricyanhydric acid, 2 Cfy + 3 H = 26-875. 



3. Ferricyanet of potassium, 2 Cfy -f- 3 K = 41-5. 

 Gmelin's red prussiate of potash : 



4. Ferricyanet of iron, 1 atom ferricyanogen, 26-5. 



3 atoms iron, 10-5. 



37- 



