Determination of Ionisable Chloride

Add to 25 cm of 0.02 M silver nitrate, 20 cm dilute nitric acid and 30 cm water in a 250 cm beaker. Cool in ice. Weigh out accurately about 0.1 g of one of the isomeric solids and dissolve in the iced solution, stir for 20 s. and filter into a prepared weighed G4 sintered glass crucible. Wash with 0.01 M nitric acid, then with ethanol and with ether. Suck dry and dry at 1 lO C to constant weight. Carry out a duplicate determination. Repeat with the other prepared solids. 

Use the same procedure as above without cooling the silver nitrate solution. Weigh out accurately about 0.1 g of [CrCl2(H20)4]CI.2H20 or [CrCl(H20)]]Cl2.H20, dissolve in water, boil for half an hour to transform to [Cr(H20)6]Cl3 and add slowly to the silver solution with constant stirring to precipitate AgCI, weighing it as above. 

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