Chemical Naming

Answers to Homework Problems

 

Chapter 2 assigned homework problems (from the text) are 13-18, 22 and 23.

 

13. Name each of the following ions.  Classify each as a monatomic or polyatomic ion.  Classify each as a cation or an anion.

            a. Na+: Sodium ion is a monatomic cation.                   d. S2-: Sulfide is a monatomic cation.

            b. OH-: Hydroxide is a polyatomic anion.                    e. Zn2+: Zinc ion is a monatomic cation.

c. SO42-: Sulfate is a polyatomic anion.                   f. Fe2+: Iron(II) ion is a monatomic anion.

           

14. Write the chemical symbol for each of the following ions.  Classify each as a monatomic or polyatomic ion.  Classify each as a cation or an anion.

            a. Magnesium ion, Mg2+, is a monatomic cation.

            b. Sulfite ion, SO32-, is a polyatomic anion.

            c. Copper(I) ion, Cu+, is a monatomic cation.

            d. Ammonium ion, NH4+, is a polyatomic cation.

            e. Bromide ion, Br-, is a monatomic anion.

 

15. Name each of the following compounds:

a. CaCl2 is calcium chloride.                             d. Ca(OH)2 is calcium hydroxide.

b. Cu(NO3)2 is copper(II) nitrate.                    e. FeSO4 is iron(II) sulfate.

            c. Na2SO4 is sodium sulfate.               

           

16. Write the chemical formula & name for each ionic compound that could be formed by the combination of 2 of the following ions: Ca2+; Na+; Cl- and SO42-.

 

            Ionic compounds form from the combination of cations with anion.  Using the above listed ions, the following combinations of ions are possible.

 

Name

Chemical Formula

Calcium chloride

CaCl2

Calcium sulfate

CaSO4

Sodium chloride

NaCl

Sodium sulfate

Na2SO4

 

17. Write the chemical formula for the ionic compound formed between each of the following pairs of ions.  Name each compound.

            a. Na+ and S2- form Na2S, sodium sulfide.

            b. Al3+ and SO42- form Al2(SO4)3, aluminum sulfate.

            c. Na+ and PO43- form Na3PO4, sodium phosphate.

            d. Mg2+ and NO2- form Mg(NO2)2, magnesium nitrite.

            e. Fe2+ and CO32- form FeCO3, iron(II) carbonate.

 

18. Write the chemical formula for the ionic compound formed between each of the following pairs of ions.  Name each compound.

            a. Cu2+ and CO32- form CuCO3, copper(II) carbonate.

            b. Sr2+ and Cl- form SrCl2, strontium chloride.

            c. NH4+ and CO32- form (NH4)2CO3, ammonium carbonate.

            d. Zn2+ and O2- form ZnO, zinc oxide.

            e. Fe3+ and CH3COO- form Fe(CH3COO)3, Iron(III) acetate.

           

22. Write the formula of the compound produced by the combination of each of the following pairs of elements.  Name each compound.

            a. Potassium and chlorine form potassium chloride, KCl.

            b. Magnesium and chlorine form magnesium chloride, MgCl2.

            c. Sulfur and oxygen form sulfur dioxide, SO2, or sulfur trioxide, SO3.

            d. Calcium and oxygen form calcium oxide, CaO.

            e. Sodium and sulfur form sodium sulfide, Na2S.

            f. Aluminum and sulfur form aluminum sulfide, Al2S3.

 

23. Write the chemical formula of each of the following:

            a. Calcium carbonate, major component of coral, seashells, and limestone: CaCO3

            b. Magnesium sulfate, found in Epsom salts: MgSO4

            c. Acetic acid, the acid in vinegar: HC2H3O2

            d. Sodium hydroxide, common name is lye: NaOH

            e. Zinc oxide, used to protect from sunlight’s UV rays when blended in an ointment: ZnO

 

Chapter 4 assigned homework problems (from the text) are 45-46, 49-52 and 54-60.

 

45. Name the following common anions using the IUPAC system of nomenclature.

            a. NO3- is nitrate.                     b. SO42- is sulfate.                    c. ClO3- is chlorate.                   d. CH3COO- is acetate.                        e. PO43- is phosphate.

                                   

46. Name the following monatomic cations using the IUPAC system of nomenclature:

            a. Na+ is sodium ion.                  b. Au3+ is gold(III) ion.                        c. Ca2+ is calcium ion.                d. Zn2+ is zinc ion.                       e. Ag+ is silver ion.

                                               

49. Name the following ionic compounds:

            a. Li2S is lithium sulfide.                      d. K2O is potassium oxide.

            b. SnO2 is tin(IV) oxide.                       e. Ba3N2 is barium nitride.

            c. RbBr is rubidium bromide.

                       

50. Name the following ionic compounds:

            a. CuI2 is copper(II) iodide.                 d. MnCl2 is manganese(II) chloride.

            b. Hg2Cl2 is mercury(I) chloride.          e. CuCO3 is copper(II) carbonate.

            c. Li3N is lithium nitride.                      f. FeO is iron(II) oxide.

 

51. Write the chemical formula for each of the following compounds:

            a. Lithium fluoride is LiF.                      b. Zinc oxide is ZnO.                c. Barium oxide is BaO.

            d. Magnesium bromide is MgBr2            e. Hydrogen cyanide is HCN.     f. Copper(I) chloride is CuCl.

 

52. Write the chemical formulas for each of the following compounds.

            a. Copper(II) chlorite is Cu(ClO2)2.       d. Copper(I) sulfate is Cu2SO4.

            b. Potassium nitrate is KNO3.                e. Sodium sulfite is Na2SO3.

            c. Barium phosphate is Ba3(PO4)2.

 

54. What is the name of the acid with the formula H3PO3?  What is the name of the HPO32- anion?   H3PO3 is phosphorous acid.  HPO32- is hydrogen phosphite.

 

55. Name the following binary molecular compounds.

            a. NO2 is nitrite     b. CO2 is carbon dioxide       c. SF6 is sulfur hexafluoride  d. SiCl4 is silicon tetrachloride               e. IF is iodine monofluoride

 

56. Name the following binary molecular compounds.

            a. AsF3 is arsenic trifluoride                                       d. CSe2 is carbon diselenide

            b. Br2O is dibromine monoxide                                     e. Cl2O7 is dichlorine heptoxide

            c. BrF5 is bromine pentafluoride

 

57. Write the chemical formula for each of the following compounds.

            a. Iodine bromide (should be iodine monobromide), is IBr        

            b. Silicon dioxide is SiO2                                  e. Bromine trifluoride is BrF3

            c. Phosphorus trichloride is PCl3                       f. Hydrogen telluride is H2Te

            d. Tetrasulfur dinitride is S4N2                        g. Xenon tetrafluoride is XeF4

 

58. Write the chemical formula for each of the following compounds.

            a. Diboron Trioxide is B2O3                               e. Silicon sulfide is SiS

            b. Dinitrogen pentasulfide is N2S5                    f. Hydrogen sulfide is H2S

            c. Phosphorus triiodide is PI3                            g. Tetraphosphorus hexoxide P4O6

 

59. Write formulas for the compounds that are expected to be formed by the following pairs of ions:

 

 

A. Cl-

B. OH-

C. SO42-

D. PO43-

E. NO3-

1. NH4+

NH4Cl

Ammonium chloride

NH4OH

Ammonium hydroxide

(NH4)2SO4

Ammonium sulfate

(NH4)3PO4

Ammonium phosphate

NH4NO3

Ammonium nitrate

2. Na+

NaCl

Sodium chloride

NaOH

Sodium hydroxide

Na2SO4

Sodium sulfate

Na3PO4

Sodium phosphate

NaNO3

Sodium nitrate

3. Mg2+

MgCl2

Magnesium chloride

Mg(OH)2

Magnesium hydroxide

MgSO4

Magnesium sulfate

Mg3(PO4)2

Magnesium phosphate

Mg(NO3)2

Magnesium nitrate

4. Ni2+

NiCl2

Nickel(II) chloride

Ni(OH)2

Nickel(II) hydroxide

NiSO4

Nickel(II) sulfate

Ni3(PO4)2

Nickel(II) phosphate

Ni(NO3)2

Nickel(II) nitrate

5. Fe3+

FeCl3

Iron(III) chloride

Fe(OH)3

Iron(III) hydroxide

Fe2(SO4)3

Iron(III) sulfate

FePO4

Iron(III) phosphate

Fe(NO3)3

Iron(III) nitrate

6. Ag+

AgCl

Silver chloride

AgOH

Silver hydroxide

Ag2SO4

Silver sulfate

Ag3PO4

Silver phosphate

AgNO3

Silver nitrate

 

60.  Write the names of the compounds of Exercise 59.  (see above table for names)