Question
Chemistry Question on Oxidation Number
The oxidation number of cobalt in K[Co(CN)4] is
A
1
B
-1
C
3
D
-3
Answer
3
Explanation
Solution
Let O.S. of Co in the complex = x O S. of K = + 1.O.S. of CN = -1 1 + x + 4(-1) = 0 x = 3
The oxidation number of cobalt in K[Co(CN)4] is
1
-1
3
-3
3
Let O.S. of Co in the complex = x O S. of K = + 1.O.S. of CN = -1 1 + x + 4(-1) = 0 x = 3