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

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phosphide = P3-

sulfide = S2-

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-

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

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+

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-

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

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

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

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-

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

Naming covalent compounds

• antimony tribromide• hexaboron (mono)silicide• chlorine dioxide

• iodine pentafluoride

• ….

SbBr3

B6Si

ClO2

I F5

more examples

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.

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…

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…

13 c page 178

3 carbon atoms

6 hydrogen atoms

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

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.

Molecular and Empirical Formulas

• C6H12O6

• H2O2

CH2O

HO

Coefficients: How many sets of a particular compound/element• 2 C6H12

Coefficients: How many sets of a particular compound/element• 5 C6H12