objectives today i will be able to: ▪ determine the oxidation number of an element in a compound...
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Objectives Today I will be able to:▪ Determine the oxidation number of an element in a compound▪ Apply rules to naming organic compounds
Informal assessment – monitoring student interactions as they complete the practice problems
Formal assessment – analyzing student responses to the practice problems and exit ticket
Common Core Connection Build strong content knowledge Make sense of problems and persevere in solving
them Reason abstractly and quantitatively
Evaluate: Warm UpExplain: Oxidation Number NotesElaborate: Oxidation Number
PracticeElaborate/ Evaluate: Organic
Nomenclature ReviewEvaluate: Exit Ticket
Write the formula for the gas laws below Boyle’s Law Ideal Gas Law
Name the acids listed then identify the acid as a strong or weak acid HBr HC2H3O2 H2SO4 HClO3 HClO2
Today I will be able to: Determine the oxidation number of an
element in a compound Apply rules to naming organic
compounds
Signed Syllabus and Safety Contract due Friday, August 29
Cation/Anion Quiz sometime the week of September 2-5
Solubility Rule Quiz sometime the week of September 8-11
Summer Assignment due September 2 Summer Assignment Exam September
2
Warm UpOxidation Number NotesOxidation Number PracticeOrganic Nomenclature ReviewExit Ticket
Are used to keep track of electrons being gained and lost
Monatomic ions oxidation number is the same as its
charge Examples: What are the oxidation
numbers when the elements below form ions?▪ Li▪ Mg▪ Al▪ O
Neutral molecules and polyatomic ions Each atom is assigned a hypothetical
charge Charge is assigned by dividing up the
electrons and through a specific set of rules
1. For an atom in its elemental form, the oxidation number is always zero
2. For any monatomic ion the oxidation number equals the ionic charge3. Nonmetals usually have negative oxidation numbers, although
sometimes they can be positive The oxidation number of oxygen is usually -2 in both ionic or
molecular compounds. Exception: Peroxides with the O22- ion giving
oxygen an oxidation number of -1. Oxidation number of hydrogen is usually +1 when bonded to
nonmetals and -1 when bonded to metals (example: NaH) Oxidation number of fluorine is -1 in all compounds. Other
halogens have an oxidation number of -1 in most binary compounds. However, when combined with oxygen in oxyanions, they have positive oxidation states
The sum of the oxidation numbers in all atoms of a neutral compound is zero. The sum of the oxidation number in a polyatomic ion equals the charge of the ion
What are the oxidation numbers for sulfur in the following compounds. H2S S8 SCl2 Na2SO3 SO42-