The document provides information on naming and writing formulas for different types of compounds including: 1) Binary ionic compounds, ionic compounds with multivalent metals, ionic compounds with polyatomic ions, acids, hydrated salts, acid salts, and double salts. 2) Molecular compounds consisting of non-metals are also covered, with prefixes converted to subscripts in formulas. 3) Key concepts include identifying cation/anion charges, recognizing polyatomic ions, and applying naming conventions based on compound type.

1. NAMING & FORMULA WRITING

2. BINARY IONIC COMPOUNDS
1) Naming:
MgCl2
ide
magnesium chlorine
= magnesium chloride

3. BINARY IONIC COMPOUNDS
2) Writing the chemical formula:
Magnesium oxide
2+ 2-
Mg O SIMPLIFY!!!
= MgO

4. IONIC COMPOUNDS WITH MULTIVALENT METALS
1) Naming:
PbI4
Check charge on non-metal
Pb I ion to see if you need to
1 4 “un-simplify”
lead (IV) iodide
= lead (IV) iodide

5. IONIC COMPOUNDS WITH MULTIVALENT METALS
1) Naming: Using the “OUS/IC” system
lead (IV) iodide
“ous” 2+ 4+ “ic”
= plumbic iodide

6. IONIC COMPOUNDS WITH MULTIVALENT METALS
2) Writing the chemical formula:
Copper (II) chloride
2+ 1-
Cu Cl
= CuCl2

7. IONIC COMPOUNDS WITH POLYATOMIC METALS
1) Naming:
Na2SO4
sodium sulfate
= sodium sulfate

8. IONIC COMPOUNDS WITH POLYATOMIC METALS
2) Writing the chemical formula:
Calcium chlorate
2+ 1-
Ca (ClO3)
= Ca(ClO3)2

9. IONIC COMPOUNDS WITH POLYATOMIC METALS
Meanings of prefixes and suffixes of polyatomic ions:
Prefix and suffix Number of Example
oxygen atoms
Hypo_____ite X-2 oxygen atoms ClO- hypochlorite
_____ite X-1 oxygen atoms ClO2- chlorite
_____ate X oxygen atoms ClO3- chlorate
Per_____ate X+1 oxygen atoms ClO4- perchlorate

10. IONIC COMPOUNDS WITH POLYATOMIC METALS
Using prefixes and suffixes of polyatomic ions:
NO- hyponitrite
NO2- nitrite
NO3- nitrate
NO4- pernitrate

11. ACIDS
ACIDS
Meanings of prefixes and suffixes of polyatomic ions:
Prefix and suffix Number of Example
oxygen atoms
Hypo_____ous X-2 oxygen atoms SO22- hyposulfurous
_____ous X-1 oxygen atoms SO32- sulfurous
_____ic X oxygen atoms SO42- sulfuric
Per_____ic X+1 oxygen atoms SO52- persulfuric

12. ACIDS
Most acids have hydrogen
1) Naming:
H2SO4(aq) HCl(aq)
Sulfuric acid Hydrochloric acid
OXYACID BINARY ACID

13. ACIDS
2) Writing the chemical formula:
Hypobromous acid
1+ 1-
H BrO
= HBrO(aq)

14. HYDRATED SALTS
1) Naming:
Sn(ClO3)2 5H2O
Name of compound (using proper rules) (prefix)hydrate
tin (II) chlorate pentahydrate

15. HYDRATED SALTS
2) Writing the chemical formula:
Copper (II) hypoiodite tetrahydrate
Formula of compound (using proper rules) #H2O
Cu(IO)2 4H2O

16. ACID SALTS
1) Naming:
Na2HPO4
1) Name the cation
2) “hydrogen” is written second with the
appropriate prefix if needed (so if it is
“mono”, then you don’t need to write it)
3) Name of anion is written last
sodium hydrogen phosphate

17. ACID SALTS
2) Writing the chemical formula:
Sodium hydrogen phosphate
1) Write the formula for the anion and its charge
2) Write the appropriate number of hydrogen atoms
3) For every H you add, add 1+ to the charge of the
polyatomic ion
4) Write the cation and its charge
5) Criss cross
1+ 3-
2-
Na HPO4
6) Simplify, if necessary
= Na2HPO4

18. DOUBLE SALTS
1) Naming:
NaFePO4
1) Name the first cation
2) Name of second cation with appropriate
prefix (except “mono”)
3) Name of anion is written last
sodium iron (II) phosphate

19. DOUBLE SALTS
1) Naming:
NaFePO4
sodium iron (II) phosphate
Must total 3+ Why is this a 2?
1+ X -3 x 1 phosphate molecule
NaFe PO4
1+ X = 3
X = 3-1
X=2

20. DOUBLE SALTS
2) Writing the chemical formula:
NaFe2(CN)5
1) Name the first cation
2) Name of second cation with appropriate
prefix (except “mono”)
3) Name of anion is written last
sodium diiron __ cyanide

21. DOUBLE SALTS
2) Writing the chemical formula:
NaFe2(CN)5
1+ 2X
-1 x 5 cyanide molecules = -5
Must total 5+
1+ 2X = 5
2X = 5-1 What number
X=2 goes here?
sodium diiron(II) cyanide
__
sodium diiron (II) cyanide

22. DOUBLE SALTS
2) Writing the chemical formula:
Potassium disilver phosphate
1) Write the chemical formula for all ions and their charges
2) Combine the second cation(s) with the anion and
determine their combined charge
1+ (1+) x 2 3-
K? Ag2 PO4 ?
1-
Ag2PO4

23. DOUBLE SALTS
2) Writing the chemical formula:
Potassium disilver phosphate
3) Determine how many atoms of the first cation are
required to make the compound neutral
1+ 1-
K Ag2PO4
= KAg2PO4

24. MOLECULAR COMPOUNDS NON-METAL + NON-METAL
NAMING…
Prefixes
• Name both elements (change the
ending of the element on the right
1 mono
to “ide” 2 di
3 tri
• Put prefixes in front of the element
4 tetra
• Eliminate the prefix “mono” if it is 5 penta
attached to the first element (the 6 hexa
element on the left)
7 hepta
WRITING THE FORMULA… 8 octa
9 nona
• Write the symbols of the elements
10 deca
• Convert the prefixes to subscripts

25. MOLECULAR COMPOUNDS
NON-METAL + NON-METAL
Writing the name: PCl5
1
mono
di
tri
tetra ide
penta phosphorus chlorine
chloride
hexa RULE #3: Eliminate the prefix “mono” if it is
attached to the first element (the element on the
hepta left)
octa
nona = phosphorus pentachloride
deca

26. MOLECULAR COMPOUNDS
NON-METAL + NON-METAL
Writing the formula: sulfur tetroxide
S1O4
= SO4
Notice how “tetroxide” is NOT spelt as tetraoxide. The “a”
in the prefix is eliminated when its followed by an “o”