Homework:
Read section 9.2 (pages 248-251)
Do problems 13-17 on page 249
and 18-22 on page 250.
Answer question 23 on page 251.
Check your answers in the back of the
book, on page 926.
Daily Quiz 247
Write the Lewis structures
for the following molecules
Daily Quiz 247
1. One atom of carbon and two
atoms of oxygen.
2. One atom of oxygen and two
atoms of chlorine.
3. Two atoms of iodine.
4. Four atoms of fluorine and one
atom of silicon.
Daily Quiz 247
1. One atom of carbon and
two atoms of oxygen.
O=C=O
Daily Quiz 247
2. One atom of oxygen and
two atoms of chlorine.
Cl-O-Cl
Daily Quiz 247
3. Two atoms of iodine.
I I
Daily Quiz 247
4. Four atoms of fluorine
and one atom of silicon.
F
F-Si-F
F
Naming Molecules
Naming Molecules
P2O5
Naming Molecules
Rule 1:
The first element in the formula is
always named first, using the entire
element name.
P2O5
Naming Molecules
Rule 1:
The first element in the formula is
always named first, using the entire
element name.
P2O5
phosphorous
Naming Molecules
Rule 2:
The second element in the formula is
named using the root of the element
and adding the suffix –ide.
P2O5
phosphorous
Naming Molecules
Rule 2:
The second element in the formula is
named using the root of the element
and adding the suffix –ide.
P2O5
phosphorous oxide
Naming Molecules
Rule 3:
P2O5
phosphorous oxide
Naming Molecules
Rule 3:
Prefixes are used to indicate the
number of atoms of each type that
are present in the compound.
P2O5
phosphorous oxide
Naming Molecules
1
2
3
4
5
monoditritetrapenta-
6 hexa7 hepta8 octa9 nona10 deca-
P2O5
phosphorous oxide
Naming Molecules
1
2
3
4
5
monoditritetrapenta-
6 hexa7 hepta8 octa9 nona10 deca-
P2O5
diphosphorous pentoxide
Naming Molecules
Exception:
The first element never uses the
prefix mono-.
Naming Molecules
Exception:
The first element never uses the
prefix mono-.
CO
carbon monoxide
Naming Molecules
Exception:
The first element never uses the
prefix mono-
CO
carbon monoxide
Not monocarbon monoxide.
Naming Molecules
You will have to use these
rules on your next test.
Naming Molecules
You will have to use these
rules on your next test.
You may use the flow chart on
any test or quiz I give for the
rest of the year.
Common Names
Common Names
We don’t usually talk about
dihydrogen monoxide
Common Names
We don’t usually talk about
dihydrogen monoxide
H2O
Common Names
We don’t usually talk about
dihydrogen monoxide.
It’s just called water.
H2O
Common Names
dihydrogen monoxide
H2O
water
Common Names
nitrogen trihydride
Common Names
nitrogen trihydride
NH3
Common Names
nitrogen trihydride
NH3
ammonia
Common Names
dinitrogen tetrahydride
Common Names
dinitrogen tetrahydride
N2H4
hydrazine
Common Names
dinitrogen monoxide
Common Names
dinitrogen monoxide
N2O
Common Names
dinitrogen monoxide
N2O
nitrous oxide
laughing gas
Common Names
nitrogen monoxide
Common Names
nitrogen monoxide
NO
nitric oxide
Common Names
I will not ask you to
memorize common names.
I just want you to know
they exist.
Naming Acids
If a molecule forms an acid
when dissolved in water, there
are other rules.
Naming Acids
Acid rule 1: binary acids (HX)
Naming Acids
Acid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of
the element
Naming Acids
Acid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of
the element
HCl
Naming Acids
Acid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of
the element
HCl
hydrochloric acid
Naming Acids
Acid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of
the element
HBr
Naming Acids
Acid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of
the element
HBr
hydrobromic acid
Naming Acids
Acid rule 2: polyatomic ions (HXY)
with no oxygen
Naming Acids
Acid rule 2: polyatomic ions (HXY)
with no oxygen
hydro________ic acid
Fill in the blank with the root of
the polyatomic ion
Naming Acids
Acid rule 2: polyatomic ions (HXY)
with no oxygen
hydro________ic acid
Fill in the blank with the root of
the polyatomic ion
Look it up on page 224
Naming Acids
Acid rule 2: polyatomic ions (HXY)
with no oxygen
hydro________ic acid
Fill in the blank with the root of
the polyatomic ion
HCN
Naming Acids
Acid rule 2: polyatomic ions (HXY)
with no oxygen
hydro________ic acid
Fill in the blank with the root of
the polyatomic ion
HCN
hydrocyanic acid
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO3
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
Look it up on page 224
HNO3
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO3
NO3
nitrate
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO3
NO3
nitric acid
nitrate
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO2
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO2
NO2
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO2
NO2
nitrite
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO2
NO2
nitrous acid
nitrite
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
An easy way to remember this rule…
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
I ate it! Ick!
Don’t bite us!
Naming Acids
Acid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
I ate it! Ick!
Don’t bite us!
For the rest of the period…
Read section 9.2 (pages 248-251)
Do problems 13-17 on page 249
and 18-22 on page 250
Answer question 23 on page 251
Check your answers in the back of the
book, on page 926.