212 IODIDE, BROMIDE, AND CHLORIDE OF SODIUM. 



Or a weighed quantity of the substance is fused 

 with about four parts, accurately weighed, of vitrified 

 borax, in a platinum crucible, when all the carbonic 



Fig. 24. 



acid is expelled, and its amount may be determined 

 from the loss of weight, or if the water is expelled at 

 the same time it must be taken into account in the 

 calculation. (See No. 7.) 



IV. Another very finely powdered portion is di- 

 gested with very dilute nitric acid, which dissolves the 

 carbonates, together with the phosphate of lime, leav- 

 ing the clay, which is filtered off, ignited and weighed. 

 It is then analyzed as in No. 111. 



The separation of the other constituents present in 

 the solution is effected as in No. 13. 



113. IODIDE, BROMIDE, AND CHLORIDE OF SODIUM. 



The solution is mixed with nitrate of protoxide of 

 palladium, when all the iodine is precipitated as dark 

 brown iodide of palladium, the bromide of palladium 



