chemistrychemistry
Ionic Bonds and Ionic CompoundsIonic Bonds and Ionic Compounds In many coastal In many coastal
countries that have countries that have warm, relatively dry warm, relatively dry climates, salt is climates, salt is produced by the produced by the evaporation of evaporation of seawater. You will seawater. You will learn how cations learn how cations and anions combine and anions combine to form stable to form stable compounds such as compounds such as sodium chloride.sodium chloride.
7.2
Formation of Ionic Formation of Ionic CompoundsCompounds
Formation of Ionic CompoundsFormation of Ionic Compounds What is the electrical charge of an ionic What is the electrical charge of an ionic
compound?compound?
7.2
Formation of Ionic Formation of Ionic CompoundsCompounds
Compounds composed of cations Compounds composed of cations and anions are called and anions are called ionic ionic compoundscompounds..
Although they are composed of Although they are composed of ions, ionic compounds are ions, ionic compounds are electrically neutral.electrically neutral.
7.2
Formation of Ionic Formation of Ionic CompoundsCompounds
Aluminum Aluminum metal and the metal and the nonmetal nonmetal bromine react bromine react to form an ionic to form an ionic solid, aluminum solid, aluminum bromide.bromide.
7.2
Formation of Ionic Formation of Ionic CompoundsCompounds
Ionic BondsIonic Bonds The electrostatic forces that hold ions The electrostatic forces that hold ions
together in ionic compounds are together in ionic compounds are called called ionic bonds.ionic bonds.
7.2
Formation of Ionic Formation of Ionic CompoundsCompounds
Animation 8 Animation 8 Take an atomic-level look Take an atomic-level look at the formation of KCl.at the formation of KCl.
Formation of Ionic Formation of Ionic CompoundsCompounds
Formula UnitsFormula Units A A chemical formulachemical formula shows the shows the
kinds and numbers of atoms in the kinds and numbers of atoms in the smallest representative unit of a smallest representative unit of a substance.substance.
A A formula unitformula unit is the lowest is the lowest whole-number ratio of ions in an whole-number ratio of ions in an ionic compound.ionic compound.
7.2
Formation of Ionic Formation of Ionic CompoundsCompounds
NaClNaCl is the chemical formula for sodium is the chemical formula for sodium chloride.chloride.
7.2
Conceptual Problem Conceptual Problem 7.27.2
Conceptual Problem 7.2Conceptual Problem 7.2
Conceptual Problem 7.2Conceptual Problem 7.2
Conceptual Problem 7.2Conceptual Problem 7.2
for Conceptual Problem 7.2for Conceptual Problem 7.2
Problem Solving 7.12 Solve Problem 12 with the help of an interactive guided tutorial.
Properties of Ionic Properties of Ionic CompoundsCompounds
Properties of Ionic CompoundsProperties of Ionic Compounds What are three properties of ionic What are three properties of ionic
compounds?compounds?
7.2
Properties of Ionic Properties of Ionic CompoundsCompounds
Most ionic compounds are Most ionic compounds are crystalline solids at room crystalline solids at room temperature. temperature.
Ionic compounds generally have Ionic compounds generally have high melting points.high melting points.
7.2
Properties of Ionic Properties of Ionic CompoundsCompounds
The orderly arrangement of component ions The orderly arrangement of component ions produces the beauty of crystalline solids.produces the beauty of crystalline solids.
7.2
Properties of Ionic Properties of Ionic CompoundsCompounds
Ionic compounds can conduct an electric current when Ionic compounds can conduct an electric current when melted or dissolved in water.melted or dissolved in water.
7.2
© 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.
© Copyright Pearson Prentice Hall
Slide 20 of 25
1. Which chemical formula is incorrect?
a. KF2
b. CaS
c. MgO
d. NaBr
7.2 Section Quiz.
© 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.
© 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.
END OF SHOW
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