1. Tardigrade
  2. Question
  3. Chemistry
  4. 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 the coordination 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)

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Q. A complex represented by $\ce{CoCl_3 . xNH_3}$ was dissolved in 1.0 kg water to make 0.1 m solution. When this was mixed with stoichiometrically required amount of solid $\ce{AgNO_3, 28.66 \, g}$ of AgCl was obtained. Assume 100% ionization of complex occurred and the coordination number of Co (III) is six. $K_f$ of water is $\ce{1.86 \, K \, kg \, mol^{-1}}$ What is the value of $\ce{\Delta \, T_f}$ of the solution upon adding the $AgNO_3$ ? (Molecular weight of AgCl is 143.3 g $mol^{-1}$)

TS EAMCET 2018

Solution:

Correct answer is (a) $0.558^{\circ} C$