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CGP EDU Academic Team
Published on: August 14, 2026
If the freezing point of a 0.01 molal aqueous solution of a cobalt(III) chloride-ammonia complex (which behaves as a strong electrolyte) is –0.0558ºC, the number of chloride(s) in the coordination sphere of the complex is [K f of water = 1.86 K kg mol –1 ]
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Δ T f = K f × i × m
0.0558 = 1.86 × i × 0.01
i = 3
Given complex behaves as a strong electrolyte
α = 100 %
n = 3 (no. of particles given by complex)
∴ complex is [Co(NH 3 ) 5 Cl]Cl 2
no. of Cl – ions in the co-ordination sphere of the complex = 1
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