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Chemistry i ia – week iii blog version
1. Welcome to Chemistry II – Day III
Portland Evening Scholars
Mr. Treothe Bullock – Instructor
Complete - Chapter Review
Presentations
Last chance to present for full
credit
Build a Molecule Simulation Lab
Debrief & Questions
Chemical Naming and
Composition - The Language of
Chemistry
Formulae & Naming
Systems
Practice reading and writing
names
Final Project Work time
Be ready to share what you think
you will research
It is an option to work with a
partner – you will double the
components you research on your
object
Today’s Goal – Research and
build slides I-III
Identify Your specific Object
Develop a list of
components / ingredients
Choose a component to
focus on
Research raw materials
sourcing
2. Chapter 7
Chemical Formula’s
Are single charged atoms
Binary Ionic Compounds
Naming Binary Molecular
Compounds
Monatomic Ions
Be able to read elements
and number of atoms
Use ide at the end of the
element name (Main group
elements or Stock system
Roman numerals (d block)
(Table 7-1)
Naming Binary Ionic
Compounds
2 elements in these
compounds
Nomenclature or naming
systems rely on both
elements.
The prefix system of
naming describes the
number of atoms (Table 73 & 4)
Some elements have more
than one ionic form
requiring stock system ID
Polyatomic ions exist and
have unique names
(Table 7-2)
3. Chapter 7
Covalent Network Compounds
These compounds are written
in the simplest ratio of
elements despite large
networks
Using Oxidation Numbers for
Formulas and Names
Acids and Salts
Most are either binary
(2 elements H & a halogen)
or
oxyacids (H, O & 3rd nonmetal
element)
Table 7-5
Formula Masses
Oxidation Numbers
Indicates general distribution
of electrons in molecular
compound or ion
Rules on p 216
Many nonmetals have more
than one oxidation state
Table 7-6 and Appendix Table
A-15 list common oxidation
numbers
2 naming systems exist –
prefix and Stock (stock is the
oxidation number)
Is the sum of the average
atomic masses of all atoms
represented in its formula.
Molar Masses
Mass if one mole of a
substance
4. Chapter 7
Molar Mass as a
Conversion Factor
Moles x molar mass =
mass in grams
Percentage
Composition
Calculation of empirical
formulas
Mass of element in
sample of compound /
mass of compound x
100 = % element in
compound
Consists of the symbols for
the elements combined in a
compound, with subscripts
showing the smallest wholenumber ratio of the different
atoms in the compound.
Use % composition and
determine mass of individual
elements – establish a molar
ratio
Calculation of Molecular
formulas
X (empirical formula) =
molecular formula
X (empirical formula mass) =
molecular formula mass
5. Welcome to Chemistry II – Week II
Homework for next week
Complete Chapter 7 review sheets –
sections 1 & 2
Remember lab safety sign off if needed.
Progress on Final Project far enough to
know you can commit on your object.
6. Welcome to Chemistry II – Week II
Homework for next week
Complete Chapter 7 review sheets –
sections 1 & 2
Remember lab safety sign off if needed.
Progress on Final Project far enough to
know you can commit on your object.