Question

How many coordinated water molecule(s) is/are present in complex C ?

• A. 4
• B. 5
• C. 6
• D. 3

Answer 1

The correct option is A 4

From the empirical formula, it is clear that the complex has total six water molecules.

Net weight of the complex- 265 g
Complex $C$ loses 13.5% of original weight=$265\times \frac{13.5}{100}$ = 36 g (nearly)

The molecular weight of one water molecule is 18g. That means there are two water molecules out of the coordination sphere. Hence there are four coordinated (inside the coordination sphere) water molecules that are present in complex C.