TS EAMCET Medical 2018 May 2 Shift 2 Paper

A complex represented by CoCl3 . xNH3 was dissolved in 1.0 kg water to make 0.1 m solution. When this was mixed with stoichiometrically required amount of solid AgNO3. 28.66 g of AgCl was obtained. Assume 100% ionization of complex occurred and thecoordination number of Co (III) is six. Kf of water is 1.86 K kg mol−1. What is the value of Δ Tf of the solution upon adding the AgNO3? (Molecular weight of AgCl is 143.3 g mol−1)