Mixed Ionic/Molecular Compound Naming


When naming compounds, the first thing you need to do is decide if the compound is ionic or molecular.


Look at the elements in the compound.

 

*Ionic compounds will contain both metals and non-metals, or at least one polyatomic ion.

 

*Molecular compounds will contain only non-metals.

 

*Acids will always include the (aq) symbol beside the formula, and the name will include the word acid.


If you are given the compound name:

*Ionic compounds do not use the prefixes di-, tri-, etc; if you see these, the compound must be molecular

 

*If the compound ends in -ate, -ite, etc., there must be a polyatomic ion, therefore the compound is ionic



REMEMBER:

 

Once you identify the compound as Ionic, Molecular, or an Acid, follow the individual rules for that type of compound.


Summary of Naming

Once you determine the type of compound, follow these rules:


Ionic

 

1.   Name the positive ion (metal or polyatomic) first

2.   Name the negative ion (nonmetal or polyatomic) second. If the negative ion is a nonmetal, change the ending to -ide. DON’T change the ending of polyatomic ion names!


Molecular

 

1.   Name each of the nonmetals, in the same order as the formula.

2.   Add prefixes to tell how many atoms of each nonmetal are present. However, ONLY use the prefix mono- with oxygen, and only if it is the final element in the formula.



Acids

 

1.   If the acid is H and another element (or a polyatomic ion not containing oxygen),

      a.   Start with the prefix hydro-

      b.   Name the second element, and change the ending to -ic

      c.   Add the word Acid

 

2.   If the acid is H and a polyatomic ion containing oxygen,

      a.   Name the polyatomic ion and change the ending

            i.   If the ion ends in -ate, change the ending to -ic

            ii.  If the ion inds in -ite, change the ending to -ous

      b.   Add the word Acid


That’s it!


Mixed Naming - Ionic and Molecular Compounds

 

Naming Compounds)

Classify each of the following compounds as ionic or covalent, then write the name of each of the following compounds.

 

 

      1. CaCl2         2. Na3N               3. NF3 

 

      4. CS2            5.   H2SO4(aq)       6. Fe2O3 

 

      7. SBr2           8. Cu(ClO3)2 

 

      9. Mg(NO3)2         10. HCl(aq)


Writing compound formulas

 

Classify each of the following compounds as ionic or covalent, then write the chemical formula for each compound.

 

1. Beryllium oxide           2. Carbon tetrabromide

 

3. Titanium (IV) oxide    4. Hydrosulfuric acid

 

5. Sodium nitrate             6. Lead (II) hydroxide

 

7.   Nitrous acid                8. Trisilicon disulfide

 

9. Ammonium chloride   10. Nitrogen monoxide

 

 


Mixed Naming - Extra practice examples

 

Naming compounds

For each of the following chemical formulas, write whether the compound is ionic or molecular, and name the compound.

 

      A) Na2S          B) NBr3    C) CuCl2  

 

      D) Ca (OH)2         E) N2O

 

 

Writing equations

Write a balanced equation to show how each of the following compounds is formed. Be sure the number of atoms of each element is the same on both sides of the equation. (3 points each)

 

      A) Potassium carbonate 

 

B) Chromium (III) chlorate

      C) Dichlorine heptoxide 

 

D) Calcium nitride

 

E) Phosphorous pentabromide

 

Naming Ionic Compounds

Using your periodic table, chart of polyatomic ions, and table of charges for common transition metals, name the following ionic compounds. Write your answers on the answer sheet provided. (1 point each)

 

      1) CaCl2        2) BaI2            3) Na3N 

 

      4) Fe2O3         5) Cu2S           6) CaSO4 

 

            7) Mg(NO3)2              8) NH4Cl 

 

            9) Sn(OH)2                 10) K2S

 

 


Ionic Compounds Formulas

Using your periodic table, chart of polyatomic ions, and table of charges for common transition metals, write formulas for the following ionic compounds. Place your answers on the answer sheet provided. (1 point each)

 

1) Hydrogen chloride       2) Potassium oxide 

 

3) Tin (II) bromide           4) Beryllium flouride

 

5) Lead (IV) oxide            6) sodium chlorate

 

7) Magnesium carbonate 

 

8) Copper (II) phosphate

 

9) Iron (III) hydroxide 

 

10) Ammonium nitrate