Question 20 of 144

A solution containing 2.675g of CoCl3.6NH3(molar mass=267.5g mol-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=143.5g mol-1). The formula of the complex is:(At.mass of Ag=108u)

(a)[CoCl(NH3)5]Cl2

(b) [CO(NH3)6]Cl3

(c) [CoCl2(NH3)4]Cl

(d) [CoCl3(NH3)3]