Question
Question: Cerium (Z = 58) is an important member of the lanthanoide. Which of the following statement about ce...
Cerium (Z = 58) is an important member of the lanthanoide. Which of the following statement about cerium is incorrect?
A
The common oxidation state of cerium are +3 and +4.
B
The +3 oxidation state of cerium is more stable than +4 oxidation state.
C
The +4 oxidation state of cerium is not known in solution.
D
Cerium (IV) acts as an oxidizing agent.
Answer
The +4 oxidation state of cerium is not known in solution.
Explanation
Solution
(3) Cerium can also show the oxidation state of +4 in solution as it leads to a noble gas configuration, from [Xe]54 4f1 5d1 6s2 to [Xe]54, after losing four electrons. It is only Ce4+ which exist in solution among the lanthanides.