Account for thhe folllowing (i) Cobalt (ii)is stablein aqueous solutio – InterviewSolution

1.	Account for thhe folllowing (i) Cobalt (ii)is stablein aqueous solutionbut in the presenceof complexingreagentsit iseasilyoxidised. (ii)The d^(1) configurationis veryunstablein ions.
Answer» SOLUTION :(i) Cobalt (iii)ion hasgreatertendencyto formcomplexesthancobalt(II) ion. ThereforeCo (ii)ion beingstablein aqueoussolutionchangesto Co (iii) ionin thepresenceof complexingreagentsand getoxidised . (ii)Ionsof transitionmetalswith `d^(1)` configurationtendto loseone electronto ACQUIRE `d^(0)` configurationthat isquitestable . Thereforesuchions(with `d^(1)`)undergoeitheroxidationor disproportionation henceunstable .

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