0.4 g of an organic compound gave 0.188 g of silver bromide by a halogen estimation method. The percentage of bromine in the compound is (at. wt. of Ag=108, Br = 80)

Carius method-Estimation of halogen "X" [Cl, Br, I] AgX  precipitate  filtered, washed, dried & weighed.  From the weight of AgX  formed we can calculate the % of "X" present in the organic compound.