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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.
Homework:
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
Daily Quiz 247
Naming Molecules
Naming Molecules
P2O5
Naming MoleculesRule 1:
The first element in the formula is always named first, using the entire element name.
P2O5
Naming MoleculesRule 1:
The first element in the formula is always named first, using the entire element name.
P2O5
phosphorous
Naming MoleculesRule 2:
The second element in the formula is named using the root of the element and adding the suffix –ide.
P2O5
phosphorous
Naming MoleculesRule 2:
The second element in the formula is named using the root of the element and adding the suffix –ide.
P2O5
phosphorous oxide
Naming MoleculesRule 3:
P2O5
phosphorous oxide
This is new!
Naming MoleculesRule 3:
Prefixes are used to indicate the number of atoms of each type that are present in the compound.
P2O5
phosphorous oxide
Naming Molecules1 mono-2 di-3 tri-4 tetra-5 penta-
P2O5
phosphorous oxide
6 hexa- 7 hepta-8 octa-9 nona-10 deca-
Naming Molecules1 mono-2 di-3 tri-4 tetra-5 penta-
P2O5
diphosphorous pentoxide
6 hexa- 7 hepta-8 octa-9 nona-10 deca-
Naming MoleculesException:
The first element never uses the prefix mono-.
Naming MoleculesException:
The first element never uses the prefix mono-.
COcarbon monoxide
Naming MoleculesException:
The first element never uses the prefix mono-
COcarbon 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 NamesWe don’t usually talk about dihydrogen monoxide
Common NamesWe don’t usually talk about dihydrogen monoxide
H2O
Common NamesWe don’t usually talk about dihydrogen monoxide.
It’s just called water.
H2O
Common Namesdihydrogen monoxide
H2Owater
Common Namesnitrogen trihydride
Common Namesnitrogen trihydride
NH3
Common Namesnitrogen trihydride
NH3
ammonia
Common Namesdinitrogen tetrahydride
Common Namesdinitrogen tetrahydride
N2H4
hydrazine
Common Namesdinitrogen monoxide
Common Namesdinitrogen monoxide
N2O
Common Namesdinitrogen monoxide
N2Onitrous oxide
laughing gas
Common Namesnitrogen monoxide
Common Namesnitrogen monoxide
NOnitric oxide
Common Names
I will not ask you to memorize common names.
I just want you to know they exist.
Naming AcidsIf a molecule forms an acid when dissolved in water, there are other rules.
Naming AcidsAcid rule 1: binary acids (HX)
Naming AcidsAcid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of the element
Naming AcidsAcid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of the element
HCl
Naming AcidsAcid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of the element
HClhydrochloric acid
Naming AcidsAcid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of the element
HBr
Naming AcidsAcid rule 1: binary acids (HX)
hydro________ic acid
Fill in the blank with the root of the element
HBrhydrobromic acid
Naming AcidsAcid rule 2: polyatomic ions (HXY) with no oxygen
Naming AcidsAcid rule 2: polyatomic ions (HXY) with no oxygen
hydro________ic acid
Fill in the blank with the root of the polyatomic ion
Naming AcidsAcid 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 AcidsAcid rule 2: polyatomic ions (HXY) with no oxygen
hydro________ic acid
Fill in the blank with the root of the polyatomic ion
HCN
Naming AcidsAcid rule 2: polyatomic ions (HXY) with no oxygen
hydro________ic acid
Fill in the blank with the root of the polyatomic ion
HCNhydrocyanic acid
Naming AcidsAcid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
Naming AcidsAcid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO3
Naming AcidsAcid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO3
Look it up on page 224
Naming AcidsAcid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO3 NO3-
nitrate
Naming AcidsAcid 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 AcidsAcid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO2
Naming AcidsAcid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO2 NO2-
Naming AcidsAcid rule 3: oxyacids (HXO)
_____ic acid if the ion ends in –ate
_____ous acid if the ion ends in -ite
HNO2 NO2-
nitrite
Naming AcidsAcid 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 AcidsAcid 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 AcidsAcid 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 AcidsAcid 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!
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.
For the rest of the period…
