ch and Mar -Determination of Chlorine. 





ami placed upon counterpoised Bcale8 just tipped the beam. A 

 few trials sufficed to bring the weight to the required point, 

 and the degree of concentration was determined by this means 

 far more accurately than by lowering the level of the liquid t«> 



marks placed upon the flasks. The hydrochloric aeid remain- 

 ing after concentration was determined as described, tin- com- 

 parison of tin 4 result with the value of the standard solution of 

 chloride indicating, of course, the total loss in the procesa 



In the experiments of Series A, 15, C, D, the effect is traced 

 increasing proportions of chloride as compared with the 

 same amount oi sulphuric acid taken. In those of Series 0, E, 

 I", the influence of changing proportions of sulphuric acid, 

 while the amount of chloride remains the same, is brought out. 

 In both sets the evidence is plain that the volatility of the 

 hydrochloric acid is dependent upon the proportion of sul- 

 phuric acid as well as upon the amount of the chloride present. 

 It appears likewise that when the amounts of sulphuric acid 

 present are reasonably small the loss of hydrochloric acid is 

 inconsiderable, if the concentration is not pushed to too great 

 an extreme. 



Series A. 



Taken 



H 2 S0 4 



[1:1]. 



Taken 



Found 



Initial 



Final 



Error. 



KC1 = 



= HC1. 



Agca = nci. 



volume. 



volume. 



cm 3 



grni. 



grm. 



grm. grm. 



cm 3 



cm 3 



grm. 



10 



005 



0-0245 



0-0963 0-0245 



110 



G5 



o-oooo 



10 



0-05 



0-0245 



0-0957 0-0243 



110 



45 



0-0002 — 



10 



0-05 



0-0245 



00945 0-0240 



110 



40 



0-0005- 



10 



0-05 



0-0245 



0-0941 0-0239 



110 



35 



00006 — 



10 



0-05 



0-0245 



0-0871 0-0221 



110 



30 



0-0024- 



10 



005 



00245 



00821 0-0209 



110 



25 



00036- 



Series B. 



10 



01 



0-0489 



0-1910 



0-0485 



110 



65 



0-0004 — 



10 



o-i 



0-0489 



0-1922 



0-0488 



110 



55 



00001 — 



10 



o-i 



0-0489 



0-1908 



0-0485 



110 



46 



0004- 



10 



o-i 



00489 



0-1894 



0-0482 



110 



35 



00007 — 



10 



0*2 



0-0978 



0-3837 



0-09715 



110 



75 



00002 — 



10 



0-2 



0-0978 



03838 



0-0970 



110 



65 



00002 — 



10 



0-2 



00978 



03831 



n-0974 



110 



55 



0-0004- 



10 



0-2 



00978 



03816 



00970 



110 



45 



00008 — 



10 



0-2 



0-0978 



0*3746 



00953 



110 



35 



0-0025- 



10 



0-2 



0-0978 



0*3322 



0-08 



110 



•::< 



0-0133 — 



Am. Jodr. Sci.— Third Series, Vol. XXXIX, No. 232.— Ahhil, 1890. 

 20 



