A complex is represented as CoCl3.xH2O . Its text0 text.1 textm solution in aqueous medium shows Δ Tf= 0.558 K . Kf for water is 1.86 kg m o l- 1 K and assuming text100 % ionisation of the complex having coordination number text6 . The formula of the complex is

Question

A complex is represented as CoCl3.xH2O . Its text0 text.1 textm solution in aqueous medium shows Δ Tf= 0.558 K . Kf for water is 1.86 kg m o l- 1 K and assuming text100 % ionisation of the complex having coordination number text6 . The formula of the complex is (A) [C o (H2 O)4 C l]Cl2 (B) [C o (H2 O)4 C l2]Cl (C) [C o (H2 O)6]Cl3 (D) [C o (H2 O)5 C l]Cl2

Tardigrade Admin · Accepted Answer

Δ Tf=i× Kf× m 0.558=i× 1.86× 0.1⇒ i=3 So, the total no of ions produce by complex per mole should be 3 [ Co ( H 2 O )5 Cl ] Cl 2 arrow[ Co ( H 2 O )5 Cl 2++2 Cl -.

Q. A complex is represented as $C o C l_{3} . x H_{2} O$ . Its $0 .1 m$ solution in aqueous medium shows $Δ T_{f} = 0.558 K$ . $K_{f}$ for water is $1.86 k g m o l^{- 1} K$ and assuming $100%$ ionisation of the complex having coordination number $6$ . The formula of the complex is

$[C o (H_{2} O)_{4} Cl] C l_{2}$

$[C o (H_{2} O)_{4} C l_{2}] Cl$

$[C o (H_{2} O)_{6}] C l_{3}$

$[C o (H_{2} O)_{5} Cl] C l_{2}$

$Δ T_{f} = i \times K_{f} \times m$
$0.558 = i \times 1.86 \times 0.1 \Rightarrow i = 3$
So, the total no of ions produce by complex per mole should be $3$
$[C o (H_{2} O)_{5} Cl] C l_{2} \to [C o (H_{2} O)_{5} C l^{2 +} + 2 C l^{-}$

Q. A complex is represented as CoCl3​.xH2​O . Its 0.1m solution in aqueous medium shows ΔTf​=0.558K . Kf​ for water is 1.86kgmol−1K and assuming 100% ionisation of the complex having coordination number 6 . The formula of the complex is

[Co(H2​O)4​Cl]Cl2​

[Co(H2​O)4​Cl2​]Cl

[Co(H2​O)6​]Cl3​

[Co(H2​O)5​Cl]Cl2​