catalyst – october 7(4), 2009
DESCRIPTION
Catalyst – October 7(4), 2009. Write and name the compound formed through Beryllium and Oxygen. Write and name the compound formed between Potassium and Sulfur. Today’s Agenda. Catalyst Practice Naming Ionic Intro to Covalent Compounds Covalent Bond Formation (more LDS’s!) - PowerPoint PPT PresentationTRANSCRIPT
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Catalyst – October 7(4), 20091. Write and name the compound
formed through Beryllium and Oxygen.
2. Write and name the compound formed between Potassium and Sulfur.
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Today’s Agenda
Catalyst Practice Naming Ionic Intro to Covalent Compounds Covalent Bond Formation (more
LDS’s!) Project Work Time
Exit Question
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What do you see? Copy the table into your notes and fill in the question marks with what you think is correct.
Formula for
Ionic Compound
Name for
Ionic Compound
NaCl Sodium chloride
CaCl2 Calcium chloride
KBr Potassium bromide
MgF2 ???
NaBr ???
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Naming Ionic Compounds
1)Write name of first element (metal).
2)Second element ends in -ide.
3)Ignore subscripts!
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Naming Ionic Compounds
Draw a mental line between the
ions.Na+ Cl-
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Naming Ionic Compounds
Binary Ionic Compound – an ionic compound
composed of two elements
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Naming Ionic Compounds
ZnO
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Naming Ionic Compounds
ZnO
Zinc Oxide
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Naming Ionic Compounds
CaCl2
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Naming Ionic Compounds
CaCl2
Calcium Chloride
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Naming Ionic Compounds
Al2O3
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Naming Ionic Compounds
Al2O3
Aluminum Oxide
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Naming Ionic Compounds
Ternary Ionic Compound – an ionic compound with more than
2 elements
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Naming Ionic Compounds
Ionic Cheat Sheets!
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Naming Ionic CompoundsDo not lose
this…you will need it the rest of your life (in my class).
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Naming Ionic Compounds
The way you use it…
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Naming Ionic Compounds1) Look up the ions
on the cheat sheet and write the words next to
them.
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Naming Ionic CompoundsBaCO3
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Naming Ionic CompoundsBaCO3
Normally the first element is the first
piece and the rest is the second piece.
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Naming Ionic CompoundsBaCO3
Barium
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Naming Ionic Compounds
If the first element is +2, where
should we find the second?(Remember, charges must
balance!)
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Naming Ionic CompoundsBaCO3
Barium
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Naming Ionic CompoundsBaCO3
Barium Carbonate
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Naming Ionic CompoundsAlPO3
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Naming Ionic CompoundsAlPO3
Aluminum
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Naming Ionic CompoundsAlPO3
Aluminum Phosphite
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Naming Ionic CompoundsH3PO4
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Naming Ionic CompoundsH3PO4
Hydrogen
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Naming Ionic CompoundsH3PO4
Think: H+, we have 3 which
means +3, where will PO4
be?
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Naming Ionic CompoundsH3PO4
Hydrogen Phosphate
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Naming Ionic CompoundsFeSO4
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Naming Ionic CompoundsFeSO4
Notice Iron appears in +2
and +3…
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Naming Ionic CompoundsFeSO4
Sulfate
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Naming Ionic CompoundsFeSO4
Since Sulfate is -2, Fe must be
+2
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Naming Ionic CompoundsFeSO4
Iron(II) Sulfate
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Naming Ionic CompoundsFeSO4
Iron(II) Sulfate or
Ferrous Sulfate
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Exit Question
What is the formula of the compound form between beryllium and phosphate. Then, name the compound.
What is the formula of the compound formed between sodium and oxygen. Then, name the compound
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Today’s Objectives
SWBAT find some atom love! SWBAT state characteristics of
covalent compounds. SWBAT model covalent bond
formation.
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Covalent Compounds in da House! Covalent compounds
are EVERYWHERE! Household cleaners
(Ammonia) Water! Salad dressing Political debate!
(think greenhouse gases)
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Find the Characteristics of Covalent Compounds….
Let’s HUNT!
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Characteristics of Covalent Compounds(Key Point #1)1. Electrons are shared2. Bonds between nonmetals and
non metals3. Usually gases at room
temperature (not crystals )4. Low melting points5. Poor conductors of electricity
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What’s the difference between ionic and covalent compounds?It is important to understand the differences between ionic and covalent compounds
Let’s review ionic compound characteristics…
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Characteristics of Ionic Compounds
1. Electrons are transferred2. Bonds between metals and
nonmetals3. Make crystals4. High melting points5. Good conductors of electricity
when dissolved
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Group Race!
Each group will complete a Double Bubble Diagram…liiiiiike this (Double Bubble doc)
Rules:1. No talking or sharing of notes!2. First person fills in ONE bubble and passes
paper to next person – cannot skip people!3. If next person doesn’t know an answer,
he/she must stand up and do 10 jumping jacks before passing paper.
4. Next person fills in ONE bubble and passes paper to next person…etc!
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How do covalent bonds form?Let’s look at Lewis Dot Structures again!
Key Point #2: Each atom in a compound satisfies the octet rule. This is shown in a Lewis Dot Structure.
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Single Bonds
Single covalent bond: one pair of shared electrons (two electrons)
Atoms may be the same H2, F2, Cl2, Br2, I2, O2
Atoms may be different HF, HCl, HBr, HI
=
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Formation of Single Covalent Bonds
ExamplesH2
F2
HCl (chlorine)
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Formation of Single Covalent Bonds
Your Turn!Cl2
HBr
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Tricks!
Central atom: in the center of a molecule, usually has lower electronegativity
Terminal atom: not in the center of a molecule
Hydrogen will NEVER be a central atom!
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Formation of Multiple Single Bonds
ExamplesNH3
SeCl2
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Formation of Multiple Single Bonds
Your Turn!NF3
CH4
CH3Cl
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Practice Time – Finish for HW! Draw the Lewis Dot Structures for the
following covalent compounds:1. Br2
2. HI3. PH3
4. H2S
5. CCl46. PH3
7. SiH4
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Exit Question
1. What are 3 characteristics of covalent compounds?
2. What is one difference between ionic and covalent compounds?
3. Draw the Lewis Dot Structure for Cl2.