Transcript Polyatomic Ions

iron(III) chloride
mercury(II) iodide
mercury(I) bromide
lead(IV) sulfide
lead(IV) oxide
copper(II) phosphide
chromium(II) iodide
manganese(III) nitride
lead(II) oxide
tin(II) sulfide
chromium(III) telluride
colbalt(III) sulfide
lead(IV) sulfide
copper(I) nitride
chromium(III) oxide
iron(III) nitride
FeCl3
HgI2
Hg2Br2
PbS2
PbO2
Cu3P2
CrI2
MnN
PbO
SnS
Cr2Te3
Co2S3
PbS2
Cu3N
Cr2O3
FeN
ferric chloride
mercuric iodide
mercurous bromide
plumbic sulfide
plumbic oxide
cupric phosphide
chromous iodide
manganic nitride
plumbous oxide
stannous sulfide
chromic telluride
cobaltic sulfide
plumbic sulfide
cuprous nitride
chromic oxide
ferric nitride
manganese(III) selenide
tin(II) phosphide
mercury(I) fluoride
cobalt(III) fluoride
tin(IV) oxide
copper(I) oxide
manganese(II) phosphide
cobalt(III) sulfide
iron(II) astatide
aluminum selenide
mercury(I) oxide
tin(IV) sulfide
lead(IV) oxide
copper(II) nitride
tin(II) oxide
cobalt(II) nitride
manganese(II) phosphide
copper(II) fluoride
Mn2Se3
Sn3P2
Hg2F2
CoF3
SnO2
Cu2O
Mn3P2
Co2S3
FeAt2
Al2Se3
Hg2O
SnS2
PbO2
Cu3N2
SnO
Co3N2
Mn3P2
CuF2
manganic selenide
stannous phosphide
mercurous fluoride
cobaltic fluoride
stannic oxide
cuprous oxide
manganous phosphide
cobaltic sulfide
ferrous astatide
--------------------mercurous oxide
stannic sulfide
plumbic oxide
cupric nitride
stannous oxide
cobaltous nitride
manganous phosphide
cupric fluoride
TODAY: Polyatomic Ions
Read pages 41-42
HW: Naming ionic
compounds involving
polyatomic ions
HW: WS 6.4
Problems: chapter 2 problems
34, 36 and 38
POLYATOMIC IONS
tightly bound groups of atoms that
behave as a unit and carry a charge
 most end in –ite or –ate
 exceptions: NH4+ – ammonium
CN– – cyanide
OH– – hydroxide

POLYATOMIC IONS
–ATE vs. –ITE
phosphate vs. phosphite
PO43PO33 –ate = one more oxygen than –ite
 charge is the same

Formula Name
1– H2PO4–
Formula Name
dihydrogen phosphate 2– HPO42–
hydrogen
C2H3O2 –
acetate
HSO3–
hydrogen sulfite
C2O42–
oxalate
HSO4–
hydrogen sulfate
SO32–
sulfite
HCO3–
hydrogen carbonate
SO42–
sulfate
NO2–
nitrite
CO32–
carbonate
NO3–
nitrate
CrO42–
chromate
CN–
cyanide
Cr2O72–
dichromate
OH–
hydroxide
SiO32–
silicate
MnO4–
permanganate
ClO–
hypochlorite
ClO2–
chlorite
ClO3–
chlorate
ClO4–
perchlorate
phosphate
3– PO43–
PO33–
1+ NH4+
phosphate
phosphite
ammonium
POLYATOMIC IONS
 when
a polyatomic ion begins with
H, it is H+ + another polyatomic ion:
 HCO3– is H+ and CO32–
 HPO42– is H+ and PO43–
TERNARY IONIC COMPOUNDS
 contain
three different elements
 usually contain a polyatomic ion
 balance the charge like a binary
compound – treat the polyatomic
ion as single unit
TERNARY IONIC COMPOUNDS
 calcium
 lithium
carbonate
carbonate
TERNARY IONIC COMPOUNDS
 magnesium
 sodium
hydroxide
phosphite
TERNARY IONIC COMPOUNDS
Al3+
OH–
Sn2+
PO43–
Na+
CrO42–
K+
MnO4–
TERNARY IONIC COMPOUNDS
calcium oxalate
potassium dichromate
chromic sulfite
lead (IV) acetate
• http://chemistry.twu.edu/tutorial/NamIonCpd.html
POLYATOMIC IONS
FROM NOW ON:
know NO CO SO PO ions
(–ates and –ites)
know NH4+
know –ides: cyanide, hydroxide
know chlorine containing ions