Nomenclature Of Coordination Compounds

The complex is composed of two ions: [Ag(H₂O)₂]⁺ and [Ag(CN)₂]^-. To properly name this complex, we need to name each ion separately according to IUPAC conventions.

1. Firstly, consider the cation [Ag(H₂O)₂]⁺:
   • Aqua: The ligand H₂O is called 'aqua'. Since there are two water molecules, it is specified as 'diaqua'.
   • Silver: The metal ion is silver (Ag). The oxidation state of Ag here is +1, indicated in Roman numerals as (I).
2. Now, consider the anion [Ag(CN)₂]^-:
   • Cyanido: The CN^- ligand is called 'cyanido'. There are two ligands, so it is specified as 'dicyanido'.
   • Argentate: When naming anionic complexes, the metal name gets an '-ate' suffix. Hence, silver becomes 'argentate'. The oxidation state of Ag here is also +1, indicated in Roman numerals as (I).

Combining these, the complete IUPAC name is diaquasilver(I) dicyanidoargentate(I), which aligns with the correct answer given.