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The elevation of boiling point of 0.10 m aqueous CrCl3 .xNH3 solution is two times that of 0.05m aqueous CaCl2 solution. The value of x is____. 

[Assume 100% ionisation of the complex and CaCl2 , coordination number of Cr as 6, and that all NH 3 molecules are present inside the coordination sphere]

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2 Answers

–1 vote
by (49.4k points)

Correct answer is 5.00

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by (15 points)
2Tb=i1×kb×0.10  -(1)

Tb=i2×kb×0.05    -(2)

Solving (1)  and  (2) ,

We get i1=i2

Now i2 (for cacl2) = 3

So, i1=3

The country point hence formed is Cr[(cl) (nh3) 5]cl2.

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