Q.

What is the maximum possible Van’t Hoff factor of CoCl3.xNH3 (assume all ammonia is co-ordinated)

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answer is 4.

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Detailed Solution

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The complex is [Co(NH3)6]Cl3 and gives three Cl and one complex ion. Hence 4 ions in total is present in solution, therefore the value of Van't Hoff factor of the complex is 4.

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