Question

Write the formula of the following coordination compound: Pentaamminecarbonatocobalt(III) chloride.

Hint:

When naming coordination compounds, the ligands are listed alphabetically, and the oxidation state of the central metal is indicated in Roman numerals.

Answer 1

The formula of the given coordination compound is \([ \text{Co(NH}_3\text{)}_5 \text{(CO}_3\text{)} ]\text{Cl}_2\). This represents a cobalt(III) complex with five ammonia (\(\text{NH}_3\)) ligands and one carbonate (\(\text{CO}_3^{2-}\)) ligand. The chloride ions are counterions outside the coordination sphere.