Bonding and Naming WS 4 Supplement for Extra Practice
Ionic Compounds - Formula Writing
EXTRA PRACTICE
Chemistry
1.
2.
3.
4.
Suggested Strategy for Name  Formula
Identify and write the cation (metal – single element - or ammonium), including the charge.
Identify and write the anion (monatomic or polyatomic), including the charge.
How many of each ion do you need to make the compound neutral?
Use a subscript following each ion to show the required number of that ion.
1.
Write the symbol for the ions that form from the following compounds
and show how many ions form: (example: Na2SO4 = 2 Na+,1 SO42-)
MgCl2
BaS
CsOH
NaNO3
CrSO3
Na2CO3
(NH4)3PO4
Hg(ClO3)2
Co2(CrO4)3
Cu(HCO3)2
2.
1 Mg2+, 2 Cl1 Ba2+, 1 S21 Cs+, 1 OH1 Na+, 1 NO31 Cr2+, 1 SO322 Na+, 1 CO323 NH4+, 1 PO431 Hg2+, 2 ClO32 Co3+, 3 CrO421 Cu2+, 2 HCO3-
Write the formula and give the name for each of the compounds
formed by these pairs of ions:
(example: Na+, SO42- = Na2SO4, sodium sulfate)
Ions
Fe , ClPb2+, S2Al3+, O2Na+, P3Ca2+, OHNH4+, O2NH4+, CO32K+, HPO42Co3+, HSO42+
Formula
FeCl2
PbS
Al2O3
Na3P
Ca(OH)2
(NH4)2O
(NH4)2CO3
K2HPO4
Co(HSO4)3
-1-
Name
iron(II) chloride
lead(II) sulfide
aluminum oxide
sodium phosphide
calcium hydroxide
ammonium oxide
ammonium carbonate
potassium hydrogen phosphate
cobalt(III) hydrogen sulfate
Bonding and Naming WS 4 Supplement for Extra Practice
3.
Write the formula for each of the following compounds:
(example: sodium sulfate = Na2SO4)
Name
Formula
silver oxide
barium fluoride
tin(IV) sulfide
magnesium nitride
sodium carbonate
aluminum hydroxide
ammonium nitrate
cobalt(III) sulfate
copper(I) phosphate
strontium acetate
iron(III) hydrogen sulfate
lead(II) oxide
magnesium cyanide
potassium hydrogen phosphate
chromium(II) oxalate
4.
Ag2O
BaF2
SnS2
Mg3N2
Na2CO3
Al(OH)3
NH4NO3
Co2(SO4)3
Cu3PO4
Sr(C2H3H2)2
Fe(HSO4)3
PbO
Mg(CN)2
K2HPO4
CrC2O4
Write the name for each of the following ionic compounds:
(example: Na2SO4 = sodium sulfate)
Formula
RbI
Al2O3
PbS
Sn(OH)2
Na2CO3
SrCr2O7
(NH4)2 SO4
Mg(ClO2) 2
Al(HCO3)3
Co2(CrO4)3
Name
rubidium iodide
aluminum oxide
lead(II) sulfide
tin(II) hydroxide
sodium carbonate
strontium dichromate
ammonium sulfate
magnesium chlorite
aluminum hydrogen carbonate
cobalt(III) chromate
-2-