Answer :

Coordinate complex is positive in the given case as it is written first in the formula. As the carbonate ligand itself has -2 charge on it and ammonia ligand has zero charge, the net charge on Co is +3. Ammine ligand comes first before carbonato according to alphabetical order. Thus the complex is named as:


Pentaaminecarbonatocobalt(iii)chloride


OR


(i) Tetrachloridocuperate (ii)


Cu is the central element with +02 oxidation state and as there are 4 chloride ions the complex has -2 charge as a whole. Thus according to the IUPAC the structure is given as:



(ii) Potassium tetrahydroxozincate (ii)


The central element is Zn which has an oxidation state +2 igven by the number in the bracket. The 4 hydroxo groups are OH- ions and the complex in total has -2 negative charge.


Thus the structure is:



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