Step 1: Identify the complex ion and its counterion
Cation complex: [Ni(H2O)3(CO)]
Counter anion: SO42-
Step 2: Identify the charges of the complex ion and its counter ion
SO42- is a polyatomic anion with -2 charge
Oxidation states: [Ni(H2O)3(CO)]x → X
SO42- → (-2) x 1 = -2
Overall oxidation state: X + (-2) = 0
X = 2+
Name the salt [Ni(H2O)3(CO)]SO4. The oxidation number of nickel is +2.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Coordination Complexes concept. You can view video lessons to learn Coordination Complexes. Or if you need more Coordination Complexes practice, you can also practice Coordination Complexes practice problems.