Quiz: Feb 3, 2005
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Transcript of Quiz: Feb 3, 2005
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Quiz: Feb 3, 2005Write the names and
formulas for the ionic compounds formed by these ions:
1. calcium and oxide2. magnesium and sulfide3. Al3+ and P3-
4. aluminum and phosphate
5. magnesium and phosphate
1. calcium oxide = CaO
2. magnesium sulfide = MgS
3. aluminum phosphide = AlP
4. aluminum phosphate = AlPO4
5. magnesium phosphate= Mg3(PO4)2
“At age 58, Banneker began the study of astronomy and was soon predicting future solar and lunar eclipses. He compiled the ephemeris, or information table, for annual almanacs that were published for the years 1792 through 1797. "Benjamin Banneker's Almanac" was a top seller from Pennsylvania to Virginia and even into Kentucky.” http://www.progress.org/banneker/bb.html
phosphide = P3-
sulfide = S2-
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Balancing formulas from Worksheet Questions
1. Na1+
2. K1+
3. Mg2+
4. Be2+
5. Sr2+
6. Cu1+
7. Zn2+
8. Ca2+
9. NH41+
NaFK2CO3
MgCl2
F1-
CO32-
Cl1-
OH1-
S2-
S2-
I1-
PO43-
I1-
K+K+
C
O
OO
2-
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1. Na1+
2. K1+
3. Mg2+
4. Be2+
5. Sr2+
6. Cu1+
7. Zn2+
8. Ca2+
9. NH41+
NaFK2CO3
MgCl2
Be(OH)2
SrSCu2S
ZnI2
F1-
CO32-
Cl1-
OH1-
S2-
S2-
I1-
PO43-
I1-
K+O
H
K+O
H
Be
Balancing formulas from Worksheet Questions
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1. Na1+
2. K1+
3. Mg2+
4. Be2+
5. Sr2+
6. Cu1+
7. Zn2+
8. Ca2+
9. NH41+
NaFK2CO3
MgCl2
Be(OH)2
SrSCu2S
ZnI2
Ca3(PO4)2
NH4I
F1-
CO32-
Cl1-
OH1-
S2-
S2-
I1-
PO43-
I1-
Ca2+
Ca 2+
OP OO
O
3-OP OO
O
3-
Ca2+
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Oxidation number
• The charge on a monatomic ion is called the oxidation number.
• An ion with more than one atom, has a different oxidation number on each atom, so the sum of the oxidation numbers equals the charge of the ion.
• Nonmetals often have more than one oxidation state (number).
• Transition metals may have more than one oxidation state (number).
• Table 7.3 lists some common oxidation numbers .
1+2+
1-
2-
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To name covalent compounds
• Covalent compounds are composed of two or more nonmetals which share electrons. (Some metalloids are covalently bonded as well).
• USE PREFIXES mono = 1 penta = 5di = 2 hexa = 6tri = 3 hepta = 7tetra = 4 octa = 8
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prefix of less electronegative atom (n ≠ 1), prefix of second atom– ending ide
Naming covalent compounds
• CO2
• CO
• P2O5
mono = 1 penta = 5di = 2 hexa = 6tri = 3 hepta = 7tetra = 4 octa = 8
• carbon dioxide• carbon monoxide• diphosphorous
pentoxideTry SF6
http://misterguch.brinkster.net/covalentcom
pounds.html
click above for more inform
ation about covalent compounds
sulfur hexafluoride
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Answers.
1. sodium fluoride2. potassium carbonate3. magnesium chloride4. beryllium hydroxide5. strontium sulfide6. copper (I) sulfide7. zinc iodide8. calcium phosphate9. ammonium iodide10. manganese (III) nitrate11. iron (III) phosphate12. cobalt (II) carbonate
1. NaF2. K2CO3
3. MgCl2
4. Be(OH)2
5. SrS6. Cu2S
7. ZnI2
8. Ca3(PO4)2
9. NH4I
10.Mn(NO3
)3
11.FePO4
12.CoCO3
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Writing Formulas
potassium fluoride
ammonium sulfate
magnesium iodide
copper (II) sulfite….
K F
(NH4)2SO4
Mg I2
CuSO3
K+ and F-
NH4+ and
SO42-
Mg2+ and
I 1-
Cu2+ and SO3
2-
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ON
O 1-
• Aluminum phosphate
• lead (II) nitrite
• cobalt (II) selenide
• silver cyanide
• copper II bicarbonate
Al3+
OP
O
O
O
3-
AlPO4
Pb2+
ON
O 1-
Pb(NO3)2
CoSe
Ag1+
C N
1-
AgCNCu2+
O
H
CO
O1-
O
H
CO
O1-
Cu(HCO3)2
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Naming covalent compounds
• antimony tribromide• hexaboron (mono)silicide• chlorine dioxide
• iodine pentafluoride
• ….
SbBr3
B6Si
ClO2
I F5
more examples
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Writing Formulas for covalent compounds
• P4S5
• O2
• SeF6
• Si2Br6
• SCl4
• …
• tetraphosphorous pentasulfide
• oxygen
• selenium hexafluoride
• disilicon hexabromide
• sulfur tetra chloride
CH4 methane, is an exception because it is an ORGANICcompound.
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Naming Organic Compounds
• Organic compounds have one or more carbons, surrounded with hydrogens.
• They may have double or triple bonds, and may include oxygen, or other atoms.
• They are named by counting the “carbon backbone” and applying a prefix
• “Functional Groups” provide the rest of the name.
meth = 1eth = 2prop = 3but = 4pent = 5hex = 6hept = 7oct = 8non = 9…
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Naming Organic Compounds
• Butane = 4 carbons
• CH3CH2CH2CH3
• Heptane = 7 carbons
• CH3CH2CH2CH2CH2CH2CH3
• Octane = 8 carbons
• CH3CH2CH2CH2CH2CH2CH2CH3
meth = 1eth = 2prop = 3but = 4pent = 5hex = 6hept = 7oct = 8non = 9…
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13 c page 178
3 carbon atoms
6 hydrogen atoms
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13 f page 178
6 carbon atoms
12 hydrogen atoms
http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA5/MAIN/1ORGANIC/ORG02/TRAM02/E/NOMOVIE/MISC.HTM
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Molecular and Empirical Formulas.• Molecular: adj. Pertaining to, consisting of,
caused by, or existing between molecules.
• Empirical: adj. 1. Relying upon or derived from observation or experiment. 2. Guided by practical experience and not theory, especially in medicine.
• Formula: n 1. an established form of words for use in a ceremony or procedure. 3. Chemistry: a. a symbolic representation of the composition or of the composition and structure of a chemical compound. b. The chemical compound so represented. c. A prescription in exact proportion: recipe.
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Molecular and Empirical Formulas
• C6H12O6
• H2O2
CH2O
HO
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Coefficients: How many sets of a particular compound/element• 2 C6H12
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Coefficients: How many sets of a particular compound/element• 5 C6H12