Presentation Transcript
Writing Complex Ion Formulas :Writing Complex Ion Formulas Central ion is first
Ligands second
Negative ligands first
Neutral molecules second
Neutral molecules and polyatomic ions are always surrounded by (parentheses), even if only 1 present
Entire complex ion formula surrounded by [brackets]
Practice Writing a Positive Complex Ion Formula :Practice Writing a Positive Complex Ion Formula Write the formula for the diamminepalladium(II) ion
Central ion – palladium (Pd)
Ligands – NH3 (2)
Written inside parentheses
Neutral charge
Brackets around entire formula
Calculate the net charge
[Pd(NH3)2]+2
Practice Writing a Negative Complex Ion Formula :Practice Writing a Negative Complex Ion Formula Write the formula for the carbonylpentacyanoferrate(II) ion
Central ion – iron (Fe)
Ligands
CN (5) -1 charge Written inside parentheses
CO (1) Neutral Written inside parenteses
Brackets around entire formula
Calculate the net charge
[Fe(CN)5(CO)]-3
Try these on your own!Write formulas for the following Complex Ions :Try these on your own!Write formulas for the following Complex Ions [Pt(NH3)4]+2
[AuI4]-
[Fe(CO)5(NO)]+2 Tetraammineplatinum(II) ion
Tetraiodoaurate(III) ion
Pentacarbonylnitrosyliron(II) ion