JEE Advanced 2015 Chemistry question
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 , the number of chloride(s) in the coordination sphere of the complex is [ of water = 1.86 K kg mol]
Answer: 1
Solution
. The complex gives 3 ions per formula unit, i.e. one complex cation and two chloride counter-ions:
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