ch. 5 ionic bonding
DESCRIPTION
Ch. 5 Ionic Bonding. Naming Section 3. Need to Know. Binary Ionic Compounds Binary – indicates that the compound is made up of just two elements. Rules for Naming Ions. Simple Cations Borrow names from names of elements Examples K + → potassium ion Zn 2+ → zinc ion. - PowerPoint PPT PresentationTRANSCRIPT
Ch. 5Ionic Bonding
NamingSection 3
Rules for Naming
Cation_________ charge
Anion_________charge
Compounds_________ charge
Rules for Naming
CationPositive charge
Borrow names
from the names of elements.
Elements that form
2 or more ions
Use Roman
#’s
AnionNegativecharge
Formed from name of element but it ends in -ide.
CompoundsNeutral charge
Made of 2 words cation always named
first
Must combine so that there is
the same (#) of (+)
& (-) charges.
Writing Formulas
Remember:
Cross Over Rule:
The # on the charge of each ion tells you the # of atoms that you
need for the opposite ion.
Simple Ions Polyatomic Ions
Contains Oxygen: Prefixes:
Writing Formulas
Remember:Compounds
must combine so that there is the same # of (+) & (-) charges.
Cross Over Rule:
The # on the charge of each ion tells you the # of atoms that you
need for the opposite ion.
Simple IonsMonatomic –
one atomPolyatomic Ions
Ion made of 2 or more atoms
Can be treated as a single ion charge is not found
atom
Contains Oxygen:* Ends with –ite
or –ate*-ite “less
oxygen”*-ate “more
oxgyen”
Prefixes:*mono – “one”* di – “two”* Thio – “replace oxygen with sulfur”
Need to Know
Binary Ionic Compounds
Binary – indicates that the compound is made up of just two elements
Rules for Naming Ions
Simple CationsBorrow names from names of
elements
Examples K+ → potassium ionZn2+ → zinc ion
Rules for Naming Ions
Elements that form two or more ions
Use Roman #’s
Examples Cu+ → copper (I) ionCu2+ → copper (II) ion
Rules for Naming IonsSimple Anions
Formed from name of element, but it ends in –ide
ExamplesCl- → chloride ionO2- → oxide ionP3- → phosphide ion
Naming Binary Ionic CompoundsThe cation is always named
first
ExamplesNaCl → Sodium ChlorideZnS → Zinc SulfideK2O → Potassium OxideCuCl2 → Copper (II) Chloride
Polyatomic Ions
poly – “many”an ion made of two or more
atoms
can be treated as a single ion charge is not found on a single atom
Polyatomic Ions
EndingsContains oxygenends with –ite or –ate-ite “less oxygen”-ate “more oxygen”
ExamplesNitrate – NO3
-
Nitrite – NO2-
Polyatomic Ions
Prefixesmono – “one”di – “two”thio – “replace oxygen with
sulfur”Examples
monohydrogen phosphate HPO42-
dihydrogen phosphate H2PO42-
Ch. 5Ionic Bonding
Practice Section 5.3
PracticeWrite the names for the following:
1. N3-
2. Fe3+
3. Mg2+
4. Ca3N2
5. FeI3
6. Na2O7. AlCl3
8. SrO9. CuCl2
10.Al2S3
PracticeWrite the formulas for the following:
1. Copper (II) oxide2. Sodium fluoride3. Zinc chloride4. Aluminum sulfide5. Potassium nitride
Practice Write the formula for he following:
1.Aluminum nitrate
2.Ammonium phosphate
3.Ammonium acetate
4.Potassium permanganate
Write the name for the following:
5.Ca(NO3)2
6.CuSO4
7.CuNO3
8.Na2CO3
9.K2Cr2O7
Homework
Section Review 5.3
#’s 5 - 8