© 2014 Pearson Education, Inc. Chapter 6 Lecture Basic Chemistry Fourth Edition Chapter 6 Ionic and Molecular Compounds 6.3 Naming Ionic Compounds Learning.

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© 2014 Pearson Education, Inc. Chapter 6 Lecture Basic Chemistry Fourth Edition Chapter 6 Ionic and Molecular Compounds 6.3 Naming Ionic Compounds Learning Goal Given the formula of an ionic compound, write the correct name; given the name of an ionic compound, write the correct formula.

© 2014 Pearson Education, Inc. Naming Ionic Compounds The name of an ionic compound has two components: the name of the metal ion which is written first and is the same as its elemental name the name of the nonmetal ion which is written last by using the first syllable of its element name followed by ide A space separates the name of the metal and nonmetal.

© 2014 Pearson Education, Inc. Names of Some Ionic Compounds

© 2014 Pearson Education, Inc. Guide to Naming Ionic Compounds with Metals That Form a Single Ion

© 2014 Pearson Education, Inc. Naming Ionic Compounds, Metal Forms a Single Ion Write the name of an ionic compound with the formula Mg 3 N 2. Step 1Identify the cation and anion. The cation from Group 2A (2) is Mg 2+, and the anion from Group 5A (15) is N 3−. Step 2Name the cation by its element name. The cation Mg 2+ is magnesium.

© 2014 Pearson Education, Inc. Naming Ionic Compounds, Metal Forms a Single Ion Write the name of an ionic compound with the formula Mg 3 N 2. Step 3Name the anion by using the first syllable of its element name followed by ide. The anion N 3− is nitride. Step 4Write the name for the cation first and the name for the anion second. Mg 3 N 2 is magnesium nitride.

© 2014 Pearson Education, Inc. Learning Check Select the correct name for each of the following ionic compounds. A.CaS (1) calcium sulfur (2) calcide sulfur (3) calcium sulfide B.K 2 O (1) dipotassium oxide (2) potassium oxide (3) potassium oxygen

© 2014 Pearson Education, Inc. Solution Select the correct name for each of the following ionic compounds. A.CaS(3) calcium sulfide B.K 2 O(2) potassium oxide

© 2014 Pearson Education, Inc. Metals with Variable Charges Transition elements and representative metals of Groups 4A (14) and 5A (15), such as Pb, Sn, and Bi, can lose s electrons from its highest energy level as well as d electrons can form two or more positively charged ions are described as having a variable charge Exceptions are zinc, silver, and cadmium, which only form one ion (Zn 2+, Ag +, and Cd 2+ ).

© 2014 Pearson Education, Inc. Metals with Variable Charges For metals that form two or more different ions, a Roman numeral equal to the ionic charge is written in parentheses after the metal name. For example, Fe 2+ is named iron(II) Fe 3+ is named iron(III) Cu + is named copper(I)

© 2014 Pearson Education, Inc. Metals with Variable Charges

© 2014 Pearson Education, Inc. Metals with Variable Charges

© 2014 Pearson Education, Inc. Guide to Naming Compounds with Variable Charge Metals

© 2014 Pearson Education, Inc. Naming Compounds with Variable Charge Metals Step 1Determine the charge of the cation from the anion. FormulaFe 2 O 3 ElementsIron (Fe) Oxide (O) GroupsTransition Group 6A (16) Element IonsFe? O 2− Charge Balance 2(Fe?) + 3(2−) = 0, Fe charge is 3+. IonsFe 3+ O 2−

© 2014 Pearson Education, Inc. Naming Compounds with Variable Charge Metals Step 2Name the cation by its element name, and use a Roman numeral in parentheses for the charge. Iron(III) Step 3Name the anion by using the first syllable of its element name followed by ide. oxide

© 2014 Pearson Education, Inc. Naming Compounds with Variable Charge Metals Step 4Write the name for the cation first and the name for the anion second. Iron(III) oxide

© 2014 Pearson Education, Inc. Names of Compounds with Variable Charge Metals Examples of compounds with variable charge metals include: CompoundSystematic Name FeCl 2 Iron(II) chloride Fe 2 O 3 Iron(III) oxide Cu 3 PCopper(I) phosphide CuBr 2 Copper(II) bromide SnCl 2 Tin(II) chloride SnS 2 Tin(IV) sulfide

© 2014 Pearson Education, Inc. Writing Formulas from the Name of an Ionic Compound Ionic compound formulas are written from the first part of the name that describes the metal ion, including its charge the second part of the name that specifies the nonmetal Subscripts are added to balance charge.

© 2014 Pearson Education, Inc. Guide to Writing Formulas from the Name of an Ionic Compound

© 2014 Pearson Education, Inc. Writing Ionic Formulas from the Name of an Ionic Compound Write the formula for chromium(III) bromide. Step 1Identify the cation and the anion. The Roman numeral (III) indicates that the charge of the ion is 3+, Cr 3+. Type of IonCationAnion Namechromium(III)bromide Grouptransition element7A (17) Symbol of IonCr 3+ Br −

© 2014 Pearson Education, Inc. Writing Ionic Formulas from the Name of an Ionic Compound Write the formula for chromium(III) bromide. Step 2Balance the charges. Step 3Write the formula, cation first, using subscripts from the charge balance. CrBr 3

© 2014 Pearson Education, Inc. Learning Check Write the name for each of the following ionic compounds. A.Li 2 S B.SnCl 2 C.Al 2 O 3 D.ZnO

© 2014 Pearson Education, Inc. Solution Write the name for each of the following ionic compounds. A.Li 2 S lithium sulfide B.SnCl 2 tin(II) chloride C.Al 2 O 3 aluminum oxide D.ZnO zinc oxide