Question

Name the complex ion [cr(cn)6]3−. the oxidation number of chromium is +3.

Answer 1

The complex ion [Cr(CN)6]3− is called hexacyanochromate(III), noting the oxidation state of +3 for the chromium and the octahedral geometry with six cyanide ligands.

Step-by-step explanation:

The complex ion of [Cr(CN)6]3− is named based on the rules for naming complex ions. Since the oxidation number of chromium in this complex is +3, and the ligand is cyanide, which is a neutral ligand and hence does not change the oxidation state, the name of the complex ion is hexacyanochromate(III). The '(III)' indicates the oxidation state of the chromium ion in the complex, which, in this case, is +3. This complex has an octahedral geometry with six cyanide ligands symmetrically coordinated around the chromium ion.

Answer 2

Cr(cn)6 is compound composed of a complex ion.According to the rule of nomenclature ligands are named first before the metal ion. ligand cyanido are 6 hence the name hexacyanido .the metal ion is named as chromate since is an anionic complex. the complex ion is therefore hexacyanidochromate(iii) ion