Question
Chemistry Question on Werner’s Theory of Coordination Compounds
The primary and secondary valencies of cobalt respectively in [Co(NH3)5Cl]Cl2 are :
A
3 and 5
B
2 and 6
C
2 and 8
D
3 and 6
Answer
3 and 6
Explanation
Solution
[Co(NH3?)5?Cl]Cl2?
Oxidation number of Co is +3.
So primary valency is 3 .
It is an octahedral complex so secondary valency 6
or Co-ordination number 6 .