Slide 1 of 29 chemistry

Slide 2 of 29 © Copyright Pearson Prentice Hall > Naming and Writing Formulas for Ionic Compounds Binary Ionic Compounds Naming Binary Ionic Compounds A binary compound is composed of two elements and can be either ionic or molecular. A binary ionic compound is composed of a metal and a nonmetal To name any binary ionic compound, place the cation (metal) name first, followed by the anion (nonmetal) name. 9.2

Slide 3 of 29 © Copyright Pearson Prentice Hall > Naming and Writing Formulas for Ionic Compounds Binary Ionic Compounds Hematite, a common ore of iron, contains iron (III) oxide. The balanced formula is Fe 2 O

Slide 4 of 29 © Copyright Pearson Prentice Hall > Naming and Writing Formulas for Ionic Compounds Binary Ionic Compounds Writing Formulas for Binary Ionic Compounds Write the symbol of the cation and then the anion. Write the charges on each ion. Cross the absolute value of the charges over and use them as subscripts. The total charge should be zero. 9.2

© Copyright Pearson Prentice Hall Slide 5 of 29 Conceptual Problem

© Copyright Pearson Prentice Hall Slide 6 of 29

© Copyright Pearson Prentice Hall Slide 7 of 29 Practice Problems Sample Problems For Conceptual Problem 9.2 Problem Solving 9.11 Solve Problem 11 with the help of an interactive guided tutorial. for Conceptual Problem 9.2

© Copyright Pearson Prentice Hall Slide 8 of 29 Practice Problems

© Copyright Pearson Prentice Hall Slide 9 of 29 > Naming and Writing Formulas for Ionic Compounds Compounds With Polyatomic Ions Write the symbol for the cation followed by the formula for the polyatomic ion and cross over to balance the charges. 9.2

Slide 10 of 29 © Copyright Pearson Prentice Hall > Naming and Writing Formulas for Ionic Compounds Compounds With Polyatomic Ions For example, calcium nitrate is composed of a calcium cation (Ca 2+ ) and a polyatomic nitrate anion ( ). In calcium nitrate, two nitrate anions, each with a 1– charge, are needed to balance the 2+ charge of each calcium cation. The formula for calcium nitrate is Ca(NO 3 ) 2. Note since there are two nitrates the nitrate ion is in parentheses, and the subscript is on the outside. 9.2

Slide 11 of 29 © Copyright Pearson Prentice Hall > Naming and Writing Formulas for Ionic Compounds Compounds With Polyatomic Ions Lead(II)sulfate is an important component of an automobile battery. 9.2

© Copyright Pearson Prentice Hall Slide 12 of 29 Conceptual Problem

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© Copyright Pearson Prentice Hall Slide 14 of 29 Practice Problems Practice Problems For Conceptual Problem 9.3 Problem-Solving 9.12 Solve Problem 12 with the help of an interactive guided tutorial. for Conceptual Problem 9.3

Slide 15 of 29 © Copyright Pearson Prentice Hall > Naming and Writing Formulas for Ionic Compounds Compounds With Polyatomic Ions Naming Compounds with Polyatomic Ions To name a compound containing a polyatomic ion, state the cation first and then the anion, just as you did in naming binary ionic compounds. 9.2

Slide 16 of 29 © Copyright Pearson Prentice Hall > Naming and Writing Formulas for Ionic Compounds Compounds With Polyatomic Ions Sodium hypochlorite (NaClO) is used as a disinfectant for swimming pools. The metallic cation in this compound is sodium (Na + ) so the polyatomic ion must be ClO –. 9.2

© Copyright Pearson Prentice Hall Section Quiz -or- Slide 17 of 29 Continue to: Launch: Assess students’ understanding of the concepts in Section section Quiz.

© Copyright Pearson Prentice Hall Slide 18 of 29 1.The correct name for CrCl 3 is a.chromium chlorine. b.chromium(III) chloride. c.monochromium trichloride. d.chromium(III) trichloride. 9.2 Section Quiz

© Copyright Pearson Prentice Hall Slide 19 of 29 2.What is the correct formula for strontium nitride? a.Sr 3 N 2 b.SrN 2 c.Sr 2 N 3 d.Sr 3 N 9.2 Section Quiz

© Copyright Pearson Prentice Hall Slide 20 of 29 3.Which one of the following compounds is named correctly? a.sodium chlorite, NaClO b.potassium nitrate, KNO 2 c.sodium acetate, NaC 2 H 3 O 2 d.lithium sulfate, Li 2 SO Section Quiz

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