1. Modern Chemistry Chapter 7 Chemical Formulas and Chemical Compounds
Sections 1, 3 & 4
Chemical Names and Formulas
Using Chemical Formulas
Determining Chemical Formulas
Ch 7 Sec 1 Chemical Names & Formulas pages

2. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Monatomic ion
Binary compound
Nomenclature
Oxyanion
Salt
Formula Mass
Percent Composition
Empirical Formula
Chapter Vocabulary
Ch 7 Sec 1 Chemical Names & Formulas pages

3. Chemical Names and Formulas
Section 1
Chemical Names and Formulas
Ch 7 Sec 1 Chemical Names & Formulas pages

4. Chemical Formula C H Molecular compounds – for one molecule
Ionic compounds – for one formula unit; the simplest ratio of cations to anions C H 8 18
Eighteen hydrogen atoms in the molecule
Eight carbon atoms in the molecule
Ch 7 Sec 1 Chemical Names & Formulas pages

5. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Chemical Formula
5 ions – two Al 3+ ions and three (SO4) 2- ions Al
(SO ) 2 4 3
4 SO4 ions
2 Al atoms
4 O atoms
Ch 7 Sec 1 Chemical Names & Formulas pages

6. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Definitions
Hydrocarbon – compounds containing hydrogen and carbon
Binary Compound – compound with only two types of atoms
Nomenclature – a naming system
Oxyanions – negative polyatomic ions with oxygen in them
Ch 7 Sec 1 Chemical Names & Formulas pages

7. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Definitions
Monatomic ions – ions formed from a single atom
For negative monatomic ions, -ide is added to the root name
Ch 7 Sec 1 Chemical Names & Formulas pages

8. How can I tell if the compound is ionic or covalent ????
Ionic compounds contain a metal and/or a polyatomic ion !!!
Ch 7 Sec 1 Chemical Names & Formulas pages

9. Writing Fomulas and Naming
Ionic Compounds
Ch 7 Sec 1 Chemical Names & Formulas pages

10. Charges on Monatomic Ions1+ 2+ 3+ 3- 2- 1-
Ch 7 Sec 1 Chemical Names & Formulas pages

11. Charges on Transition Metals
Ag 1+
Zn 2+
Cu 1+ or 2+
Fe/Cr 2+ or 3+
Sn 2+ or 4+
Pb 2+ or 4+
Ch 7 Sec 1 Chemical Names & Formulas pages

12. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Charges of Metals
PbO2 and PbO
Ch 7 Sec 1 Chemical Names & Formulas pages

13. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Polyatomic Ions Page 226
Ch 7 Sec 1 Chemical Names & Formulas pages

14. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Ionic Compounds
Formulas
Write the symbols
Determine the charges
Monatomic ions from the periodic table
Transition metals from a roman numeral
Polyatomic ions from a chart on p. 226
Cross the charges.
Reduce to lowest ratio.
Ch 7 Sec 1 Chemical Names & Formulas pages

15. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Ionic Compounds
Names
Write the cation name.
Write the anion name.
Add –ide to the anion if monatomic
Add the roman numeral for any transition or group 14 metal.
NO PREFIXES!!!!
Ch 7 Sec 1 Chemical Names & Formulas pages

16. Ionic Binary Compounds
Aluminum Oxide
FORMULAS 3+ 2- Al O 3 2
(3+ x ) + (2- x ) = 0 2 3
Al2O3
(charge x subscript)+(charge x subscript) = 0
Ch 7 Sec 1 Chemical Names & Formulas pages

17. Ionic Binary Compounds
Aluminum Oxide
FORMULAS 3+ 2- Al O 3 2
REDUCE IF NECESSARY!!
Al2O3
Ch 7 Sec 1 Chemical Names & Formulas pages

18. Ionic BinaryCompounds
NAMING
Mg3N2
NO PREFIXES!!
Magnesium
Nitrogen
ide
Ch 7 Sec 1 Chemical Names & Formulas pages

19. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
1. Write formulas for the binary ionic compounds formed between the following elements:
a. potassium and iodine
b. magnesium and chlorine
c. sodium and sulfur
d. aluminum and sulfur
e. aluminum and nitrogen
2. Name the binary ionic compounds indicated by the following formulas:
a. AgCl e. BaO
b. ZnO f. CaCl2
c. CaBr2
d. SrF2
Practice Page 223
Ch 7 Sec 1 Chemical Names & Formulas pages

20. Ionic Compounds with Transition Metals
FORMULAS
Iron (III) Chloride 3+ 1- Fe Cl 1 3
(3+ x ) + (1- x ) = 0 1 3
FeCl3
Ch 7 Sec 1 Chemical Names & Formulas pages

21. Ionic Compounds with Transition Metals
FORMULAS
Tin (II) Oxide 2+ 2- Sn O 1 1
(2+ x ) + (2- x ) = 0 1 1
SnO
Ch 7 Sec 1 Chemical Names & Formulas pages

22. Ionic Compounds with Transition Metals
FORMULAS
Tin (II) Oxide 2+ 2- Sn O 2 1 1 2
REDUCE!
SnO
Ch 7 Sec 1 Chemical Names & Formulas pages

23. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
1. Write the formula and give the name for the compounds formed between the following ions:
a. Cu 2+ and Br − d. Hg 2+ and S 2−
b. Fe 2+ and O 2− e. Sn 2+ and F −
c. Pb 2+ and Cl − f. Fe 3+ and O 2−
2. Give the names for the following compounds:
a. CuO c. SnI4
b. CoF d. FeS
Practice Page 225
Ch 7 Sec 1 Chemical Names & Formulas pages

24. Ionic Compounds with Transition Metals
NAMING
PbO
( x 1 ) ( 2- x 1 ) = 0 2+
NO PREFIXES!!
Lead II
Oxygen
ide
Ch 7 Sec 1 Chemical Names & Formulas pages

25. Ionic Compounds with Polyatomic Ions
FORMULAS
Ammonium Sulfate + 2-
(NH )
(SO ) 4 2 4 1
(1+ x ) (2- x ) = 0 2 1
(NH4)2SO4
Parenthesis are needed if the p. ion has a subscript from the crossed charge – outside the ( ).
Ch 7 Sec 1 Chemical Names & Formulas pages

26. Ionic Compounds with Polyatomic Ions
NAMING
Ca(NO3)2
NO PREFIXES!!
Calcium
Nitrate
Ch 7 Sec 1 Chemical Names & Formulas pages

27. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
1. Write formulas for the following ionic compounds:
a. sodium iodide e. copper(II) sulfate
b. calcium chloride f. sodium carbonate
c. potassium sulfide g. calcium nitrite
d. lithium nitrate h. potassium perchlorate
2. Give the names for the following compounds:
a. Ag2O
b. Ca(OH)2
c. KClO3
d.NH4OH
e. Fe2(CrO4)3
f. KClO
Practice Page 227
Ch 7 Sec 1 Chemical Names & Formulas pages

28. Writing Fomulas and Naming
Molecular Compounds
Ch 7 Sec 1 Chemical Names & Formulas pages

29. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Prefixes for Covalent
Ch 7 Sec 1 Chemical Names & Formulas pages
p. 228

30. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Molecular Compound
Formulas
Write the symbols.
Use prefixes for subscripts.
DON’T reduce.
Ch 7 Sec 1 Chemical Names & Formulas pages

31. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Molecular Compound
Names
Write the name of the elements.
Order: Smaller group number first;
Same group? Greater period number first.
Add –ide to the second element.
Add prefixes to each element for the number of atoms.
Ch 7 Sec 1 Chemical Names & Formulas pages

32. Binary Molecular Compounds
FORMULAS
Disulfur difluoride S F 2 2
DON'T REDUCE!
S2F2
Ch 7 Sec 1 Chemical Names & Formulas pages

33. Binary Molecular Compounds
NAMING O N 2 4 di
nitrogen
tetra
oxygen
ide
Ch 7 Sec 1 Chemical Names & Formulas pages

34. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
1. Name the following binary molecular compounds:
a. SO3
b. ICl3
c. PBr5
2. Write formulas for the following compounds:
a. carbon tetraiodide
b. phosphorus trichloride
c. dinitrogen trioxide
Practice Page 229
Ch 7 Sec 1 Chemical Names & Formulas pages

35. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Acids and Salts
Acids – Chapter 14
Binary Acids – two elements; hydrogen and one other element
Oxyacids – contain hydrogen, one other element and oxygen
Acid – a solution of the compound in water.
Ch 7 Sec 1 Chemical Names & Formulas pages

36. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Acids and Salts
Salt – an ionic compound
Made from
the cation of a base and
the anion of an acid
Some retain an H in the anion
Example: CO3 2- carbonate
HCO3 1- hydrogen carbonate or bicarbonate
Ch 7 Sec 1 Chemical Names & Formulas pages

37. Salt Definition Animation
Ch 7 Sec 1 Chemical Names & Formulas pages
p. 230

38. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
List of Acids
Ch 7 Sec 1 Chemical Names & Formulas pages
p. 230

39. Ch 7 Sec 1 Chemical Names & Formulas pages 219-231
Section 1 Homework
Section Review Page 231 #1-5
Ch 7 Sec 1 Chemical Names & Formulas pages