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Potassium as an Oxydizing mixture. 197 
solved substances with the sulphur. 
hen nitric acid was used with the chlorate, it happened 
thrown out of the flask. After the acid has once n 
added, however, the mixture may be heated gently without 
risk of loss, 
No matter whether chlorhydric or nitric acid is employed 
with the chlorate, the solution must at last be largely diluted 
with water before adding the chlorid of barium. 
n my experiments, nothing but hot water was employed to 
wash the sulphate of barium. Naturally enough it was more 
difficult to wash in this way the precipitates obtained from 
solutions contaminated with nitric acid, than those from the 
solutions which contained only chlorhydric acid. But in spite 
