NAMING IONIC COMPOUNDS METAL CHARGES Some metals have

NAMING IONIC COMPOUNDS: METAL CHARGES Some metals have more than one common ion: n iron: Fe 2+ or Fe 3+ n copper: Cu 1+ or Cu 2+ n tin: Sn 2+ or Sn 4+ Use STOCK system or CLASSICAL system to name these compounds.

NAMING IONIC COMPOUNDS: STOCK SYSTEM Roman numeral = charge of the ion n Fe 2+ is named iron (II) n Fe 3+ is named iron (III) n Cu 1+ = copper (I) n Cu 2+ = copper (II)

NAMING IONIC COMPOUNDS: STOCK SYSTEM examples: Fe. Cl 2 iron (II) chloride Pb. F 4 lead (IV) fluoride Cu 2 O copper (I) oxide Sn. S 2 tin (IV) sulfide

NAMING IONIC COMPOUNDS: CLASSICAL SYSTEM root word for element + new suffix n –ous = lower charged ion n –ic = higher charged ion n Fe 2+ = ferrous ion, Fe 3+ = ferric ion n Cu 1+ = cuprous ion, Cu 2+ = cupric ion

NAMING IONIC COMPOUNDS: CLASSICAL SYSTEM examples: Fe. Cl 2 ferrous chloride Pb. F 4 plumbic fluoride Cu 2 O cuprous oxide Sn. S 2 stannic sulfide

WRITING FORMULAS examples: chromic bromide mercury (II) nitride cobaltous oxide iron (III) iodide Cr. Br 3 Hg 3 N 2 Co. O Fe. I 3

Formula Cu 1+ Cu 2+ Fe 3+ Hg 22+ Hg 2+ Pb 4+ Sn 2+ Sn 4+ Cr 2+ Cr 3+ Mn 2+ Mn 3+ Co 2+ Co 3+ Stock Name Classical Name copper (I) ion copper (II) ion iron (III) ion mercury (II) ion lead (IV) ion tin (II) ion tin (IV) ion chromium (III) ion manganese (III) ion cobalt (III) ion cuprous ion cupric ion ferrous ion ferric ion mercurous ion mercuric ion plumbous ion plumbic ion stannous ion stannic ion chromous ion chromic ion manganous ion manganic ion cobaltous ion cobaltic ion