INTRODUCTION 5 



Caustic potash, 20 per cent. 



,, 0-1 

 Ammonia. 



Sodium carbonate, 1 per cent. 

 Ammonium sulphide solution. 

 Ammonium sulphate, saturated solution. 

 Silver nitrate, 1 per cent. 

 Barium chloride, saturated solution. 

 Ammonium molybdate solution. 

 Millon's reagent l 

 Solution of ferrocyanide of potassium. 



litmus. 



sodium phosphate. 



iodine in potassium iodide. 



ferrous sulphate. 



ferric chloride. 



sodium nitroprusside. 



Alcohol. 

 Ether. 



Esbach's reagent. 3 



Solution of copper sulphate, 1 per cent. 

 Fe tiling's solution. 

 Lime water. 



The following additional reagents will be required by those taking the 

 advanced course : 



Solution of mercuric chloride. 



potassium ferricyanide. 



Sodium carbonate, saturated solution. 



,, chloride, saturated solution. 



10-per-cent. solution. 



Magnesium sulphate, saturated solution. 

 Baryta mixture. 3 

 Sodium acetate solution. 4 

 Phosphoric acid, 0'5 per cent. 



In addition to these, there should be kept in stock in the laboratory, to 

 be given out for the lessons in which they are used, the following : 



Solid sodium chloride. 



,, magnesium sulphate. 



,, ammonium sulphate. 



,, sodio-magnesium sulphate. 



Standard solution of uranium acetate or nitrate for estimating 

 phosphates. 5 



1 Mercury is dissolved in its own weight of strong nitric acid. The solution so 

 obtained is diluted with twice its volume of water. The decanted clear liquid is 

 Millon's reagent. 



2 Ten grammes of picric acid and 20 grammes of citric acid are dissolved in 

 800 to 900 c.c. of boiling water, and then sufficient water added to make up a litre. 



3 Made by mixing 1 volume of barium-nitrate solution with 2 of barium- 

 hydrate solution, both saturated in the cold. 



4 Prepared as follows : Sodium acetate, 100 grammes ; water, 900 c.c. ; glacial 

 acetic acid, 100 c.c. 



5 Instructions how to make standard solutions will be given in the lessons 

 where they are used. 



