iron(III) chloride FeCl3 ferric chloridemercury(II) iodide HgI2 mercuric iodidemercury(I) bromide Hg2Br2 mercurous bromidelead(IV) sulfide PbS2 plumbic sulfidelead(IV) oxide PbO2 plumbic oxidecopper(II) phosphide Cu3P2 cupric phosphidechromium(II) iodide CrI2 chromous iodidemanganese(III) nitride MnN manganic nitridelead(II) oxide PbO plumbous oxidetin(II) sulfide SnS stannous sulfidechromium(III) telluride Cr2Te3 chromic telluridecolbalt(III) sulfide Co2S3 cobaltic sulfidelead(IV) sulfide PbS2 plumbic sulfidecopper(I) nitride Cu3N cuprous nitridechromium(III) oxide Cr2O3 chromic oxideiron(III) nitride FeN ferric nitride

manganese(III) selenide Mn2Se3 manganic selenidetin(II) phosphide Sn3P2 stannous phosphidemercury(I) fluoride Hg2F2 mercurous fluoridecobalt(III) fluoride CoF3 cobaltic fluoridetin(IV) oxide SnO2 stannic oxidecopper(I) oxide Cu2O cuprous oxidemanganese(II) phosphide Mn3P2 manganous phosphidecobalt(III) sulfide Co2S3 cobaltic sulfideiron(II) astatide FeAt2 ferrous astatidealuminum selenide Al2Se3 ---------------------mercury(I) oxide Hg2O mercurous oxidetin(IV) sulfide SnS2 stannic sulfidelead(IV) oxide PbO2 plumbic oxidecopper(II) nitride Cu3N2 cupric nitridetin(II) oxide SnO stannous oxidecobalt(II) nitride Co3N2 cobaltous nitridemanganese(II) phosphide Mn3P2 manganous phosphidecopper(II) fluoride CuF2 cupric fluoride

TODAY: Polyatomic IonsTODAY: Polyatomic Ions

Read pages 41-42Read pages 41-42

HW: Naming ionic compounds involving HW: Naming ionic compounds involving polyatomic ionspolyatomic ions

HW: WS 6.4HW: WS 6.4

Problems: chapter 2 problems 34, 36 and 38Problems: chapter 2 problems 34, 36 and 38

POLYATOMIC IONSPOLYATOMIC IONStightly bound groups of atoms tightly bound groups of atoms

that behave as a unit and carry a that behave as a unit and carry a chargecharge

most end in –ite or –atemost end in –ite or –ateexceptions:exceptions: NHNH44

++ – ammonium – ammonium

CNCN–– –– cyanide cyanide

OHOH–– –– hydroxide hydroxide

POLYATOMIC IONSPOLYATOMIC IONS

––ATE vs. ATE vs. ––ITEITE phosphate vs. phosphitephosphate vs. phosphite

POPO443-3- PO PO33

3-3- – –ate = one more oxygen than –iteate = one more oxygen than –ite charge is the samecharge is the same

Formula Name Formula Name

1– H2PO4– dihydrogen

phosphate2– HPO4

2– hydrogen

C2H3O2 – acetate phosphate

HSO3– hydrogen sulfite C2O4

2– oxalate

HSO4– hydrogen sulfate SO3

2– sulfite

HCO3– hydrogen carbonate SO4

2– sulfate

NO2– nitrite CO3

2– carbonate

NO3– nitrate CrO4

2– chromate

CN– cyanide Cr2O72– dichromate

OH– hydroxide SiO32– silicate

MnO4– permanganate 3– PO4

3– phosphate

ClO– hypochlorite PO33– phosphite

ClO2– chlorite

ClO3– chlorate 1+ NH4

+ ammonium

ClO4– perchlorate

POLYATOMIC IONSPOLYATOMIC IONS when a polyatomic ion begins with when a polyatomic ion begins with

H, it is HH, it is H++ + another polyatomic ion: + another polyatomic ion: HCOHCO33

–– is H is H++ and CO and CO3322––

HPOHPO4422–– is H is H++ and PO and PO44

33––

TERNARY IONIC COMPOUNDSTERNARY IONIC COMPOUNDS contain three different elementscontain three different elements usually contain a polyatomic ionusually contain a polyatomic ion balance the charge like a binary balance the charge like a binary

compound – treat the polyatomic compound – treat the polyatomic ion as single unition as single unit

TERNARY IONIC COMPOUNDSTERNARY IONIC COMPOUNDS calcium carbonatecalcium carbonate

lithium carbonatelithium carbonate

TERNARY IONIC COMPOUNDSTERNARY IONIC COMPOUNDS magnesium hydroxidemagnesium hydroxide

sodium phosphitesodium phosphite

AlAl3+3+ OHOH––

SnSn2+2+ POPO4433––

NaNa++ CrOCrO4422––

KK++ MnOMnO44––

TERNARY IONIC COMPOUNDSTERNARY IONIC COMPOUNDS

calcium oxalatecalcium oxalate

potassium dichromatepotassium dichromate

chromic sulfitechromic sulfite

lead (IV) acetatelead (IV) acetate

TERNARY IONIC COMPOUNDSTERNARY IONIC COMPOUNDS

• http://chemistry.twu.edu/tutorial/NamIonCpd.html

POLYATOMIC IONSPOLYATOMIC IONSFROM NOW ON:FROM NOW ON:

know NO CO SO PO ionsknow NO CO SO PO ions

((––ates and ates and ––ites)ites)

know NHknow NH44++

know know ––ides: cyanide, ides: cyanide, hydroxidehydroxide

know chlorine containing ionsknow chlorine containing ions