11/21/2011 standards: 2 objectives: a. be able to figure relative lattice energies b. be able to put...
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11/21/2011 Standards: 2Objectives:a. Be able to figure relative lattice energiesb. Be able to put + & - ions together to make molecular formulas for
ionis compoundsc. Be able to name more types of ionic compounds.DO NOW:1. Which has more lattice energy and why? BeCl2 or CsBr (hints: larger charge, bigger lattice energy
smaller atom, bigger lattice energy)HOMEWORK:1. ChemThink.com - Ionic Bonding, Ionic Formulas(10 pts) Std 2 due Tu 11/292. Write Chemical Formulas & Name - Practice (5 pts) Std 2==========================================================STAMPS: Journal 11/181. Ch 8.4 Sec Assess, p. 231 40-44 (2pts) Std: 2 2. Ch 8 Assess, p. 237 80-84 (3 pts) Std 2
New Stamp Sheetsfront side 13-15back side 16-18
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Lattice Energies are always given as negative numbers
SIZESmaller ion ===> more lattice energy
Larger ion ===> less lattice energy
CHARGELarger (+ or -) ===> more lattice energy
INDIRECT
DIRECT
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Rules for Making Ionic CompoundsUse the oxidation # of element.
For all representative elements, group # determines oxidation #. Group 1 = 1+Group 2=2+, Gp 3=3+, Gp 6=2-, Gp 7=1-
EXAMPLE: Write the correct formula with the following 2 elements: Ca & Cl
Ca2+
Cl
-1
1-
Since the charges are different you will need to use subscripts to indicate the ratio of ions in the formula
Ca2+
Cl1- Step 1:
Cross the charges over
Ca Cl 2+1-
Step 2: Remove + and - signs Ca Cl 21
Step 3: Write the completed formula, no 1's & smallest ratiosCaCl2
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--->
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11/22/2011 Standards: 2 Objectives:a. Be able to estimate lattice energy (LE) of ionic compoundsb. Be able to name ionic compounds, binary & poly anions. DO NOW:1. Name these molecules: FeCl3 SnSO4 SnBr
V(CO3)2 VCl5 VPO4 V(C2H3O2)2 2. Last night's homework problems.HOMEWORK:1. Enjoy Thanksgiving – be grateful for your many blessings===================================================STAMPS: Journal 11/211. Write Chemical Formulas & Name - Practice (5 pts) Std 2
RESPONDERS
(Roman numberals for 1-6)
http://youtu.be/nrPsChYAI9g(Click on blue dot below & to the left, for YouTube video of the presentation of the following page)
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How to use Roman numberals in naming metalic compounds where metal has more than 1 positive oxidation state:
Fe 2, 3, 6
Ru 2, 3, 4, 6, 8
Nb 3, 4, 5
http://youtu.be/nrPsChYAI9g(Link for video of this presentation, copy/paste into browser address)
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Show video on different oxidation states of V before stamping - demo transition metals that have multiple oxidation states. Interactive Chalkboard
Do course2-assignment-ionic-formulas.notebook 4 question quiz w responders
Do Ch-08-ionic-compound.notebook 16 questions w responders
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/2011 Standards: z Objectives:a. DO NOW: 1.
HOMEWORK:1. ================================================================
STAMPS:Journal
BASKET:
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/2011 Standards: z Objectives:a. DO NOW: 1.
HOMEWORK:1. ====================================================================
STAMPS:Journal
BASKET:
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/2011 Standards: z Objectives:a. DO NOW: 1.
HOMEWORK:1. ====================================================================
STAMPS:Journal
BASKET:
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