0.2585g of an organic compound contaning iodine was heated with excess of strong nitric acid and silver nitrate in a carius tube. The precipitate of silver iodide was fiterred, washed and dried its weight was found to be 0.3894g . Calculate the % of iodine in the compound.

Answer

0.814

Explanation

Wt. of organic compound = 0.2585 g
Wt. of silver iodide formed = 0.3894 g
`AgI -= I`
235 g of Agl gives iodide = 127 g
0.3894 g of Agl gives iodide `= ( 127 ) / ( 235) xx 0.3894`
% of iodine `= ( 127)/(235) xx ( 0.3894)/( 0.25 85) xx 100`
`81. 4 %`