CHAPTER XVII 



SULPHUE AND ITS COMPOUNDS 



Physical Properties of Sulphur. It will be well to first 

 carefully examine the physical properties of sulphur. It is a 



brittle, yellow solid, which may be 

 easily reduced to a fine powder. 

 It is insoluble in water, but as we 

 have already seen, it is soluble in 

 carbon disulphide (Expt. 208). It 

 also dissolves to a slight extent in 

 turpentine. When heated it melts, 

 and the melting point, i.e., the 

 temperature during melting, may 

 be determined in the following 

 manner : 



EXPT. 252. Draw out, in a 

 blow-pipe flame, a piece of glass 

 tubing so as to make a small thin- 

 walled tube, about 2 or 3 inches 

 long and *1 inch in diameter. In 

 this place some finely powdered 

 sulphur and fix the tube to the 

 bulb of the thermometer (it will 

 probably stick to it if moistened ; 

 if not, platinum wire is best). 

 Place the thermometer bulb with 

 the lower part of the tube in a 

 beaker of sulphuric acid and heat 

 it gently. W atch the sulphur 



PIG. 127. How to determine the 

 Melting Point of Sulphur. 



