1. chemistry

2. Naming and Writing Formulas for Ionic Compounds
9.2
A recipe is a formula for the sauce—a complete list of ingredients and their proportions. Chemistry also uses formulas. Once you know the rules, you can write the formula for any chemical compound.

3. Binary Ionic Compounds
9.2
Binary Ionic Compounds
Binary Ionic Compounds
How are the names of binary ionic compounds determined?
How do you write the formulas for binary ionic compounds?

4. Binary Ionic Compounds
9.2
Binary Ionic Compounds
These masks are made of an ionic compound with the common name gypsum. This name does not tell you anything about the chemical composition of the compound, though.
These masks are made of an ionic compound with the common name gypsum (CaSO4 · 2H2O). Gypsum is also used in wallboard.

5. Binary Ionic Compounds
9.2
Binary Ionic Compounds
Naming Binary Ionic Compounds
A binary compound is composed of two elements and can be either ionic or molecular.
To name any binary ionic compound, place the cation name first, followed by the anion name.

6. Binary Ionic Compounds
9.2
Binary Ionic Compounds
Tin(II) sulfide, or SnF2, is added to toothpastes to prevent cavities.
Tin(II) fluoride and tin(IV) sulfide have different compositions and uses. a) Tin(II) fluoride is added to toothpastes to prevent cavities. b) Tin(IV) sulfide is used in glazes for porcelain fixtures and dishes. Inferring What are the charges on the tin ions in the two compounds?

7. Binary Ionic Compounds
9.2
Binary Ionic Compounds
Tin(IV) sulfide, or SnS2, is used in glazes for porcelain fixtures and dishes.
Tin(II) fluoride and tin(IV) sulfide have different compositions and uses. a) Tin(II) fluoride is added to toothpastes to prevent cavities. b) Tin(IV) sulfide is used in glazes for porcelain fixtures and dishes. Inferring What are the charges on the tin ions in the two compounds?

8. Binary Ionic Compounds
9.2
Binary Ionic Compounds
Hematite, a common ore of iron, contains iron (III) oxide. The balanced formula is Fe2O3.
In the process for making steel, iron is extracted from hematite, an ore containing iron(III) oxide. Applying Concepts What is the formula for iron(III) oxide?

9. Binary Ionic Compounds
9.2
Binary Ionic Compounds
Writing Formulas for Binary Ionic Compounds
Write the symbol of the cation and then the anion. Add whatever subscripts are needed to balance the charges.

10. Simulation 9
Simulation 9 Simulate combining ions and deriving the chemical formulas for several ionic compounds.

11. 9.2
Conceptual Problem 9.2

12. 9.2
Conceptual Problem 9.2

13. 9.2
Conceptual Problem 9.2

14. Sample Problems For Conceptual Problem 9.2
Problem Solving 9.11 Solve Problem 11 with the help of an interactive guided tutorial.

15. Compounds With Polyatomic Ions
9.2
Compounds With Polyatomic Ions
Compounds with Polyatomic Ions
How do you write the formulas and names of compounds containing polyatomic ions?

16. Compounds With Polyatomic Ions
9.2
Compounds With Polyatomic Ions
Write the symbol for the cation followed by the formula for the polyatomic ion and balance the charges.

17. Compounds With Polyatomic Ions
9.2
Compounds With Polyatomic Ions
For example, calcium nitrate is composed of a calcium cation (Ca2+) and a polyatomic nitrate anion (NO3–).
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(NO3)2.

18. Compounds With Polyatomic Ions
9.2
Compounds With Polyatomic Ions
Oysters produce calcium carbonate to form their shells and sometimes pearls.
Some examples of ionic compounds containing polyatomic ions are shown. a) Oysters produce calcium carbonate to form their shells and sometimes pearls. b) Lead(II) sulfate is an important component of an automobile battery. c) Compounds such as ammonium sulfate or ammonium phosphate are common fertilizers.

19. Compounds With Polyatomic Ions
9.2
Compounds With Polyatomic Ions
Lead(II)sulfate is an important component of an automobile battery.
Some examples of ionic compounds containing polyatomic ions are shown. a) Oysters produce calcium carbonate to form their shells and sometimes pearls. b) Lead(II) sulfate is an important component of an automobile battery. c) Compounds such as ammonium sulfate or ammonium phosphate are common fertilizers.

20. 9.3
Conceptual Problem 9.3

21. 9.3
Conceptual Problem 9.3

22. 9.3
Conceptual Problem 9.3

23. Practice Problems For Conceptual Problem 9.3
Problem-Solving 9.12 Solve Problem 12 with the help of an interactive guided tutorial.

24. Compounds With Polyatomic Ions
9.2
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.

25. Compounds With Polyatomic Ions
9.2
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–.
Sodium hypochlorite (NaClO) is often added to the water in swimming pools to prevent bacteria from exceeding safe levels.

26. 9.2 section Quiz.
Assess students’ understanding of the concepts in Section 9.2.

27. 9.2 Section Quiz
1. The correct name for CrCl3 is
chromium chlorine.
chromium(III) chloride.
monochromium trichloride.
chromium(III) trichloride.

28. 9.2 Section Quiz
2. What is the correct formula for strontium nitride?
Sr3N2
SrN2
Sr2N3
Sr3N

29. 9.2 Section Quiz
3. Which one of the following compounds is named correctly?
sodium chlorite, NaClO
potassium nitrate, KNO2
sodium acetate, NaC2H3O2
lithium sulfate, Li2SO3

30. END OF SHOW