b.9 continued-ish in which you will learn about: naming covalent (molecular) compounds
TRANSCRIPT
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B.9 Continued-ish
In which you will learn about:•Naming covalent (molecular)
compounds
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Naming Molecular Compounds
CH4 methaneBCl3 boron trichloride
CO2 Carbon dioxide
All are formed from two or more nonmetals.
Ionic compounds generally involve a metal and nonmetal (NaCl)
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Molecular (Covalent) Nomenclaturefor two nonmetals
• Prefix System (binary compounds)
1. Less electronegative atom comes first.
2. Add prefixes to indicate # of atoms. Omit mono- prefix on the FIRST element. Mono- is OPTIONAL on the SECOND element (in this class, it’s NOT optional!).
3. Change the ending of the second element to -ide.
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PREFIXmono-di-tri-tetra-penta-hexa-hepta-octa-nona-deca-
NUMBER123456789
10
Molecular Nomenclature Prefixes
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• CCl4
• N2O
• SF6
• carbon tetrachloride
• dinitrogen monoxide
• sulfur hexafluoride
Molecular Nomenclature: Examples
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• arsenic trichloride
• dinitrogen pentoxide
• tetraphosphorus decoxide
• AsCl3
• N2O5
• P4O10
More Molecular Examples
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Learning Check
Fill in the blanks to complete the following names of covalent compounds.
CO carbon ______oxide
CO2 carbon _______________
PCl3 phosphorus _______chloride
CCl4 carbon ________chloride
N2O _____nitrogen _____oxide
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Learning Check
1. P2O5 a) phosphorus oxide
b) phosphorus pentoxidec) diphosphorus pentoxide
2. Cl2O7 a) dichlorine heptoxide
b) dichlorine oxidec) chlorine heptoxide
3. Cl2 a) chlorine
b) dichlorinec) dichloride
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Overall strategy for naming chemical compounds.
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A flow chart for naming binary compounds.
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Mixed Review
Name the following compounds:1. CaO
a) calcium oxide b) calcium(I) oxidec) calcium (II) oxide
2. SnCl4
a) tin tetrachloride b) tin(II) chloride c) tin(IV) chloride
3. N2O3
a) nitrogen oxide b) dinitrogen trioxidec) nitrogen trioxide
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Mixed Practice
1. Dinitrogen monoxide2. Potassium sulfide3. Copper (II) nitrate4. Dichlorine heptoxide5. Chromium (III) sulfate6. Iron (III) sulfite7. Calcium oxide8. Barium carbonate9. Iodine monochloride
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Mixed Practice
1.1. BaIBaI22
2.2. PP44SS33
3.3. Ca(OH)Ca(OH)22
4.4. FeCOFeCO33
5.5. NaNa22CrCr22OO77
6.6. II22OO55
7.7. Cu(ClOCu(ClO44))22
8.8. CSCS22
9.9. BB22ClCl44