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					Naming Compounds                                       Name _______________________________
Worksheet #3                                                    date ________                  per. _______

Systems for Naming Chemical Compounds
and Writing Formulas From Names.

I. Learn to identify types of compounds.                      Classify each compound as:

          A.   Acid                            formula begins with "H" (or ends with "-COOH")

          B.   Molecular                       formula has all nonmetals,
                                               name uses prefixes; "mono-, di-, tri-,   etc.

          C.   Ionic                           formula begins with a metal (or NH4), ends with a nonmetal

                                               you may see Roman numerals in the name

II. Each type above has its own system of naming.                         KEEP TRACK OF WHICH TYPE OF COMPOUND YOU
ARE NAMING and work with that system.

Step III. Practice

Step IV. Practice, practice and practice

Step V. More Practice ?                     (YES ! )

(So . . . let’s practice ! ! !)   Classifying compounds.          Use the rules for the three types above.
                                                                           the "staircase" in the
Use the position of the elements on the periodic table to identify them as: metals or nonmetals. (Find
upper right corner. Metals are below and to the left, nonmetals in the upper right .)

1.   Label each of the following as: "A" (acid), "M" (molecular), or "I" (ionic)

Na2S                CO2               Mg(OH)2                   CaO               KNO3                 LiCH3COO       HCl

Fe2SO4              ZnCr2O7           N2 O 5           KClO3             BaCl2                 H2SO4          NH4Cl   HNO3

PbI2                SF6               SO3              CuCl              SnBr4                         NaHCO3         P 2 O5
System ONE:                        NAMING ACIDS
The system for naming acids is quite involved and most of the acids you will see this year are on this list. You may pick up some
patterns and figure names of others on your own. (Your workbook explains it well on pp 160-169.)

We will keep this simple to start with. You need to learn only six of the
most common acids listed in your textbook on p71, table 2.8 and on p136,
table 4.2
1. Find the names of these acids now:

        HC2H3O2 _________________________________

        H2CO3 ____________________________________

        HNO3 _____________________________________

        H2SO4 ____________________________________

        HCl ______________________________________

        H3PO4 ____________________________________

2. What do their formulas have in common?

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