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Question
Name an element of lanthanoid series which is well knwon to shown +4 oxidation state. Is it a strong oxidising agent or reducing agent?
Solution
Ce(Z = 58)
Ce = 4f15d16s2
It is a strong oxidising agent.
⇒ Formationof Ce4+ is favoured because its noble gas configuration, but it is a strong oxidant due to the common +3 state. E° value Ce4+/ Ce3+ =+1.74 V
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