1. chemistry

2. Ionic Bonds and Ionic Compounds In many coastal countries that have warm, relatively dry climates, salt is produced by the evaporation of seawater. You will learn how cations and anions combine to form stable compounds such as sodium chloride. In many coastal countries that have warm, relatively dry climates, salt is produced by the evaporation of seawater. You will learn how cations and anions combine to form stable compounds such as sodium chloride. 7.2

3. Formation of Ionic Compounds Formation of Ionic Compounds Formation of Ionic Compounds What is the electrical charge of an ionic compound? What is the electrical charge of an ionic compound? 7.2

4. Formation of Ionic Compounds Compounds composed of cations and anions are called ionic compounds. Compounds composed of cations and anions are called ionic compounds. Although they are composed of ions, ionic compounds are electrically neutral. Although they are composed of ions, ionic compounds are electrically neutral. 7.2

5. Formation of Ionic Compounds Aluminum metal and the nonmetal bromine react to form an ionic solid, aluminum bromide. Aluminum metal and the nonmetal bromine react to form an ionic solid, aluminum bromide. 7.2

6. Formation of Ionic Compounds Ionic Bonds Ionic Bonds The electrostatic forces that hold ions together in ionic compounds are called ionic bonds. The electrostatic forces that hold ions together in ionic compounds are called ionic bonds. 7.2

7. Formation of Ionic Compounds Animation 8 Take an atomic-level look at the formation of KCl. Animation 8 Take an atomic-level look at the formation of KCl.

8. Formation of Ionic Compounds Formula Units Formula Units A chemical formula shows the kinds and numbers of atoms in the smallest representative unit of a substance. A chemical formula shows the kinds and numbers of atoms in the smallest representative unit of a substance. A formula unit is the lowest whole- number ratio of ions in an ionic compound. A formula unit is the lowest whole- number ratio of ions in an ionic compound. 7.2

9. Formation of Ionic Compounds NaCl is the chemical formula for sodium chloride. NaCl is the chemical formula for sodium chloride. 7.2

10. Conceptual Problem 7.2

14. for Conceptual Problem 7.2 Problem Solving 7.12 Solve Problem 12 with the help of an interactive guided tutorial.

15. Properties of Ionic Compounds Properties of Ionic Compounds Properties of Ionic Compounds What are three properties of ionic compounds? What are three properties of ionic compounds? 7.2

16. Properties of Ionic Compounds Most ionic compounds are crystalline solids at room temperature. Most ionic compounds are crystalline solids at room temperature. Ionic compounds generally have high melting points. Ionic compounds generally have high melting points. 7.2

17. Properties of Ionic Compounds The orderly arrangement of component ions produces the beauty of crystalline solids. The orderly arrangement of component ions produces the beauty of crystalline solids. 7.2

18. Properties of Ionic Compounds Ionic compounds can conduct an electric current when melted or dissolved in water. Ionic compounds can conduct an electric current when melted or dissolved in water. 7.2

19. © Copyright Pearson Prentice Hall Slide 19 of 25 Section Quiz -or- Continue to: Launch: Assess students’ understanding of the concepts in Section 7.2 Section Quiz. 7.2.

20. © Copyright Pearson Prentice Hall Slide 20 of 25 1. Which chemical formula is incorrect? a.KF 2 b.CaS c.MgO d.NaBr 7.2 Section Quiz.

21. © Copyright Pearson Prentice Hall Slide 21 of 25 2. Ionic compounds can conduct an electric current a.only when melted. b.when melted or dissolved in water. c.only when dissolved in water. d.when solid or melted. 7.2 Section Quiz.

22. © Copyright Pearson Prentice Hall Slide 22 of 25 3. At room temperature, most ionic compounds are a.crystalline solids. b.liquids. c.gases. d.soft, low melting-point solids. 7.2 Section Quiz.

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