1. Ch. 6 Notes---Chemical Names & Formulas
Ionic Compounds (“________”):
Name or formula starts with a _________ (or NH4 +, ammonium).
Other quick ways to tell if the compound is ionic:
formula uses parentheses
Example: ________________
formula contains more than 2 elements (capital letters)
name uses Roman numerals
name ends in “-ate” or “ite”.
Example: _________________
salts
metal
Ca(OH)2
FeCrO4
lead(II) chloride
barium sulfate

2. Naming Ionic Compounds
Molecular Compounds (“____________”):
Name or formula starts with a ____________ (exception: NH4 +)
Other quick ways to tell if the compound is molecular:
Name has prefixes and also ends in “-ide”. (It must have both!)
Examples: _________________,_______________________
Naming Ionic Compounds
Just use your ion sheet and find the names of the ions.
cation name anion name
Practice Problems: Name the following ionic compounds.
a) NaC2H3O b) (NH4)2CO c) Fe(OH)3 d) PbSO4
molecules
nonmetal
carbon dioxide
dinitrogen pentoxide
iron
(III)
lead
(II)
sodium
acetate
ammonium
carbonate
sulfate
hydroxide

3. Writing Formulas for Ionic Compounds
Step 1-- Use your ion sheet and find the ions and their charges.
Step 2-- “Cross the charges” if they don’t balance out.
Step 3-- Use parentheses around polyatomic ion “chunks”.
Practice Problems: Write the formula for each ionic compound.
copper(II) bromide ____________________
aluminum nitrite _________________________
barium hydrogen carbonate ___________________________
Cu+2
Br -1
CuBr2
…(don’t show 1’s) =
Al+3
NO2 -1
Al(NO2)3 =
Ba+2
HCO3-1
Ba(HCO3)2 =

4. Naming Molecular Compounds
You do not use the ion sheet for molecules because no __________ are needed. They ______________ electrons instead of transferring them.
Use ________________ to indicate the # and kind of atom in the compound.
mono=1 di=2 tri=3 tetra=4 penta=5 hexa=6 hepta=7 octa=8 non=9 deca=10
Use the general format shown below…
prefix-(except mono)-name the 1st element prefix-name the 2nd element ending with -ide
Practice Problems: Name the following molecules.
N2O CO Cl4F SO3
charges
share
prefixes
carbon monoxide
dinitrogen pentoxide
tetrachlorine heptafluoride
sulfur trioxide

5. Writing Molecular Formulas
The prefixes in the name tell you the # of atoms of each element there are. (Those become the _________________ in the formula!)
Practice Problems: Write the formula for each molecule.
nitrogen monoxide carbon tetrachloride diphosphorous pentoxide
Acids
All acids begin with the element ________________.
General format: H(X), where “(X)” represents the ______________.
There are 2 general types of acids:
If the name of “(X)” ends in –ite or –ate, then it is an _________ acid.
If the name of “(X)” ends in –ide, then it is a ____________ acid. The acids just contains ____ elements, hydrogen and a nonmetal. (There’s NO oxygen!)
subscripts
CCl4
P2O5 NO
hydrogen
anion
oxy-
binary 2

6. Naming Oxy-Acids Naming Binary Acids
If the name of “(X)” ends in –ate… ____________-ic acid
If the name of “(X) ends in –ite… ____________-ous acid
Practice Problems: Name these acids.
H2SO H3PO HNO H2CO HC2H3O HClO2
Naming Binary Acids
If the name of “(X)” ends in –ide… hydro-__________-ic acid
H2S HCl HF
sulfuric acid
phosphorous acid
nitric acid
carbonic acid
acetic acid
chlorous acid
hydrosulfuric acid
hydrochloric acid
hydrofluoric acid

7. Writing the Formulas for Acids
FIRST You must determine the formula for the anion, “(X)”.
If the acid’s name starts with “________” (and ends in “–ic”), the name of the anion used ends in “_______”. Therefore, it is a _________ acid. (There’s only hydrogen and one other nonmetal in the formula!)
The subscript on the hydrogen equals the anion’s charge!
Examples: hydrobromic acid = ________
hydroiodic acid = _______
hydrosulfuric acid = ________
hydro
-ide
binary
HBr HI
H2S

8. If the acid’s name ends with “______” without the “hydro-” prefix, the name of the anion used ends in “_______”. Therefore, it is an ____ acid.
The subscript on the hydrogen equals the anion’s charge!
Examples: perchloric acid = __________
oxalic acid = ___________
If the acid’s name ends with “______”, the name of the anion used ends in “_______”. (It’s is also an oxy-acid.)
Examples: hypochlorous acid = __________
nitrous acid = ____________
sulfurous acid = ____________
-ic
-ate
oxy-
HClO4
H2C2O4
-ous
-ite
HClO
HNO2
H2SO3