If the freezing point of a 0.01 molar aqueous solution of a cobalt(III) chloride-ammonia complex (which behaves as a strong electrolyte) is $- {0.0558}^{\circ} C$ , the number of chloride(s) in the coordination sphere of the complex is
$[K_{f} o f w a t e r = 1.86 {K kg mol}^{- 1}]$

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Solution

$Δ T_{f} = K_{f} \times i \times m$
$0.0558 = 1.86 \times i \times 0.01$
$i = 3$
Given complex behaves as a strong electrolyte
$α = 100 %$
$n = 3$ (no. of particles given by complex)
$∴$ complex is $[C o (N H_{3})_{5} C l] C l_{2}$
no. of $C l^{-}$ ions in the coordination sphere of the complex = 1

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Q. If the freezing point of a 0.01 molar aqueous solution of a cobalt(III) chloride-ammonia complex (which behaves as a strong electrolyte) is

- {0.0558}^{\circ} C

, the number of chloride(s) in the coordination sphere of the complex is

[K_{f} o f w a t e r = 1.86 {K kg mol}^{- 1}]

If the freezing point of a 0.01 molal aqueous solution of a cobalt chloride ammonia complex ( which behaves as a strong electrolyte ) is 0.0558 degree Celsius, the number of chloride in the coordination sphere of the complex is ? (kf of water = 1.86k kg/mole