Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
Chapter 7 Part 1
Writing formulas and names for compounds.
Objectives:
1. Write names and formulas for ionic compounds.
2. Write names and formulas for binary covalent compounds.
3. Write names and formulas for acids.
I. Ionic compounds
1. Positive ion is always written first in name and formula
2. Ionic compounds are always written empirically.
3. Oxidation #'s of elements must total zero. Use subscripts to
balance formulas.
4. If an ion has more than 1 charge, a roman numeral is used to
designate the charge in the name.
For example: Tin II is tin with a +2 charge.
Tin IV is tin with a +4 charge.
The roman numeral designates the charge of the ion.
5. If a subscript is used with a polyatomic ion, write parentheses
around the polyatomic ion and write the subscript outside the
parentheses.
monatomic ion­ one atom "Na+"
polyatomic ion­ more than one atom "SO42­"
Ionic compounds are formed from a metal and a nonmetal.
Cl1­ Mg2+ Cl1­ 2+
Ba
Ba2+ Ba2+ Ba2+ N3­ N3­ NO31­ NO31­ A B
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
Examples using monatomic ions
6
Ba3N2
barium nitride ______
Li
2O
______
7
Na3N
sodium nitride ______
______
CuS
8
Be3N2
beryllium nitride______
4
Cu3P
copper I phosphide ______
9
aluminum oxide
5
Cu3P2
copper II phosphide ______
10
Na2S
sodium sulfide ______
1
MgCl2
magnesium chloride ______
2
lithium oxide
3
copper II sulfide
Al
______
2O3
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
Examples using polyatomic ions
1 magnesium sulfate _____
MgSO4
Pb(CN)
_____ 2
6 lead II cyanide
2 lithium sulfate
_____
Li2SO4
7 potassium chromate
3 calcium chlorate
Ca(ClO3)2
_____
8 zinc iodide
(NH4)2SiO3
4 ammonium silicate _____
5 magnesium permanganate
_____
9 calcium phosphite
K_____
2CrO4
ZnI2
_____
Ca3_____
(PO3)2
Cr(OH)3
10 chromium III hydroxide_____
Mg(MnO4)2
CaS _______________________
SnS _______________________
SnS2 _______________________
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
Write the formula and name of each compound:
copper I iodide
1. Na2CO3 ______________________ 2. CuI _____________________
sodium carbonate
copper II oxide
copper I oxide
3. CuO ________________________ 4. Cu2O ____________________
5. CuO2 _______________________ 6. SnCr
tin II dichromate
2O7 _________________
copper II peroxide
chromium III oxide
7. Pb(ClO3)4 ___________________ 8. Cr
lead IV chlorate
2O3 ___________________
mercury I sulfate
lead II chromate
9. Hg2SO4 ____________________ 10. PbCrO
4 __________________
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
II. Binary Covalent Compounds
Systematic Names
Suffix
­ide used only on second word
Prefixes:
Mon ­ 1 ­used only with 2nd word
di ­ 2
tri ­ 3
tetra ­ 4
penta ­ 5 a is dropped with oxide; pentoxide
hexa ­ 6
hepta ­ 7
octa ­ 8
nona ­ 9
deca ­ 10
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
Examples:
1. H2O water
dihydrogen monoxide
HOH hydrogen hydroxide
carbon monoxide
carbon dioxide
3 CO ___________________
2. CO2 ________________________
dinitrogen pentoxide
dinitrogen monoxide
4. N2O _________________________ 5. N
2O5 _________________
nitrogen dioxide
dinitrogen trioxide
6. NO2 _________________________ 7. N
2O3 _________________
dicarbon dihydride
8. C2H2 ________________________
What is the difference between nitrogen dioxide and nitrite?
NO2
NaNO2
Nitrogen dioxide is a molecule with zero charge, and can exist on its own.
Nitrite is an ion with 1­ charge, and can not exist on its own.
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
III. Writing names and formulas of acids
All acids have:
H A A is a negative ion, H is hydrogen
H2A
H3A
All acids are dissolved in water, (aqueous solutions.)
A. Binary Acid
Two elements: hydrogen and a monatomic negative ion
Prefix ­root ­ suffix
hydro­ root ­ ic
1. hydrochloric acid ______________ 2. hydrosulfuric acid ________
3. H3P __________________________
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
B. Ternary Acids
Acids that have polyatomic ions with oxygen.
Prefix ­ root ­ suffix
Skip two lines. per ­ root ­ ic corresponds to 1 more oxygen atom than the ­ate ion
perchloric acid
________
root ­ ic corresponds to the ­ate ion
chloric acid
________
root ­ ous corresponds to the ­ite ion:1 less oxygen atom than ­ate
chlorous acid
________
hypo ­ root ­ ous 2 less oxygen atoms than the ­ate ion
hypochlorous acid
1. sulfuric acid _____________ ________
2 sulfurous acid __________
3. hyposulfurous acid ____________ 4. persulfuric acid __________
5. hypophosphorous acid _________ 6 HNO2 ______________________
7. H3P ______________________ 8. H3PO5 ____________________
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Chemistry 1 H Chapter 7 Part 1 Notes Block 4.notebook
May 02, 2017
I. Write formulas for the following ionic compounds.
Zn(NO3)2
1. zinc nitrate ___________________
(NH4)2CO3
2. ammonium carbonate ___________
II. Write names for the following compounds.
aluminum chlorate
1. Al(ClO3)3 ___________________________
tin II chromate
2. Sn(CrO4)2 ____________________________
III. Write formulas for the following binary covalent compounds.
C2H2
1. dicarbon dihydride _______________
N3O5
2. trinitrogen pentoxide ______________
IV. Write names for the following binary covalent compounds.
hexacarbon hexahydride
1. C6H6 _______________________
pentanitrogen nonachloride
2. N5Cl9 ________________________
V. Write formulas for the following acids.
HF
1. hydrofluoric acid ____________
HNO4
2. pernitric acid ________________
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