An octahedral complex with the formula CoCl3 nNH3 upon reaction with excess of AgNO3 solution gives 2 moles of AgCl. Consider the oxidation state of Co in the complex is 'x'. The value of "x + n" is .
- 6
- 5
- 3
- 8
Answer
(4) 8
Solution
2 mol AgCl means 2 Cl- are ionisable and 1 Cl is inside the coordination sphere.
With CN = 6 the sphere holds 5 NH3 + 1 Cl, so the complex is [Co(NH3)5Cl]Cl2 and n = 5.
x + 0 - 1 - 2 = 0, so x = 3 (Co is +3)
∴ x + n = 3 + 5 = 8
Answer: (4)