as the solution made contains 16-97 grammes of AgNO 3 , 

 it contains j^th of the molecular weight of AgNO 3 per litre. 

 i c. c. of this solution therefore represents yu^nr f tne 

 molecular weight of chlorine, or of NaCl, i. e., '00355 grammes 

 of chlorine, or '00585 grammes of NaCl. 



1.415. The solution of which the Cl or NaCl has to be 

 determined must either be neutral, or slightly alkaline with 

 a fixed alkali, or slightly acidulated with acetic acid. The 

 potassium chromate used for titration must be also neutral 

 and free from chlorides. 



1.416. The following calculations refer to an actual 

 analysis of a sample of Sodium Nitrate: 



Porcelain crucible H- sodium nitrate ... =60-65 grams 



Porcelain crucible alone ... =25-657 



35 grams, 







(i ) Moisture. 



Watch glass + clip -f nitrate of soda ... =27-3725 



Watch glass -f clip + dry NaNOs ... =27-2245 



/.Moisture in 3 grammes ... = -148 



Moisture in i gram ... ='04933=4*93 percent. 

 (2) Insoluble matter. 



Glass tube 4- stopper 4- paper -f insoluble 



matter ... ... ... =13-180 



Tube 4- stopper 4- paper ... =13-832 



Insoluble matter in 35 grammes ... '048 



/.Insoluble matter in t gram =-00137 ='14 per cent. 



After ignition. 



Crucible 4- ash ... ... ... =29-3620 



Crucible alone ... ... ... =29-3315 



/.Insoluble siliceous matter ... ... ='0009 (in i gram) 



=c '09 per cent. 



