AIEEE 2010 Solved Paper

A solution containing 2.675g of CoCl3.6NH3 (molar mass =267.5gmol−1 ) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78g of AgCl (molar mass =143.5gmol−1 ). The formula of the complex is ( At. Mass of Ag=108u)