2 g of a sample containing NaCl,NaBr nd some inert impurities dissolve in water nd treated with 0.5M sliver nitrate solution to give 2.6 g of mixed precepitate AgCl nd AgBr.the precepitate was treated with concentrate solution sodium bromine giving 3g AgBr precepitate determine volume silver nitrate use nd mass percentage of NaCl nd NaBr.

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