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Which of the following is the central atom/ion in [CoCl(NH3)5]^2+?(a) Co(b) Co^2+(c) Co^3+(d) Cl^–The question was posed to me in an online quiz.Question is taken from Definitions in portion Coordination Compounds of Chemistry – Class 12

Answer» RIGHT choice is (c) Co^3+

To EXPLAIN I would say: The central ion in the given complex ion is cobalt as it accepts electrons to form a bond with CL ATOM and AMMONIA molecules. Since the primary valence of Co in this compound is +3, the ion in Co^3+.


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