202 ANALYTICAL CHEMISTRY. 



21. Small pestle and mortar. (Fig. 15, D.) 



22. Small porcelain crucible. 



23. Small platinum crucible (Fig. 15, E.) 



24. Wire triangle to support the crucible. (Fig. 15, F.) 



Reagents needed in qualitative analysis. 



a. Liquids. 



1. Sulphuric acid, sp. gr. 1.84, H 2 SO 4 . 



2. Sulphuric acid diluted, sp. gr. 1.068. 



3. Hydrochloric acid, sp. gr. 1.16, HC1. 



4. Hydrochloric acid diluted, sp. gr., 1.049. 



5. Nitric acid, sp. gr. 1.42, HNO 3 . 



6. Acetic acid, sp. gr. 1.048, C 2 H 4 2 . 



7. Hydrosulphuric acid, either the gas or its solution in water, H 2 S. 



8. Ammonium sulphide, (NH 4 ) 2 S. 



9. Ammonium hydrate (water of ammonia), NH 4 HO. 



10. Ammonium carbonate, (NH 4 ) 2 CO 3 . A solution of one part of the salt in a 

 mixture of four parts of water and one part of water of ammonia. 



11. Ammonium chloride, NH 4 C1 ; ten per cent, solution. 



12. Ammonium oxalate, (NH 4 ) 2 C 2 4 ; five per cent, solution. 



13. Ammonium molybdate, (NH 4 ) 2 Mo0 4 . A five per cent, solution of the_salt 

 in a mixture of equal parts of water and nitric acid. 



14. Sodium hydrate, NaHO. ] 



15. Sodium carbonate, Na 2 C0 3 . 



16. Sodium phosphate, Na 2 HP0 4 . 



17. Sodium acetate, NaC 2 H 3 2 . \ Ten P er cent - solutions. 



18. Potassium chromate, K 2 CrO 4 . 



19. Potassium dichromate, K 2 Cr 2 O 7 . 



20. Potassium iodide, KI. ~] 



21. Potassium ferrocyanide, K 4 FeCy 6 . I Fiye per cent solutions . 



22. Potassium ferricyanide, K 6 Fe 2 Cy 12 . 



23. Potassium sulphocyanate, KCyS. 



24. Magnesium sulphate, MgSO 4 . ] 



25. Barium chloride, BaCl 2 . L Ten per cent, solutions. 



26. Calcium chloride, CaCl 2 . 



27. Calcium hvdrate, Ca2HO (lime-water). ) 



<->/-,! i 1. * n an V Saturated solutions. 



28. Calcium sulphate, CaSO 4 . 



29. Ferric chloride, Fe 2 Cl 6 . 1 



30. Lead acetate, Pb.2C 2 H 3 O 2 . 



31. Silver nitrate, AgNO 3 . \- Five per cent, solutions. 



32. Mercuric chloride, HgCl 2 . 



33. Platinic chloride, PtCl 4 . 



b. Solids. 



1. Litmus or blue and red paper. 



2. Turmeric paper. 



3. Sodium carbonate, dried, Na 2 C'O 3 . 



