11/28/2011 Standards: 2
RESPONDERS
Objectives:
a. Be able to describe formation of ionic bonds
b. Review for Quiz 2.3 (Ch 8 + Density - 2 problems)
c. Be able to name and figure relative lattice energies for ionic cmpds
DO NOW:
1. Write the correct chemical formula for the ionic compounds formed by each
of these pairs of elements:
Al & P(3-); Ca & Br; Fr & 52Te
HOMEWORK:
1. Ch 8 Ch Assess, p. 236 47-59 (leave out 56 & 58) - copy questions, given your
best answer & reason for the answer. Answers will be on-line this evening.
(5 pts)
2. Create Help Sheet for Quiz 2.3 (Ch 8 + 2 density probs) (5 pts)
3. Don't forget the ChemThink.com assignment, due tonight (10 pts)
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STAMPS:
Ex Cr for card decs for Mem Ions 2 (11 total now)
NOUNCEMENT: My son Jacob and I, will be singing at the Variety
Show – Fri 12/9 (next week)
AN
On-Line app for iPhones: "EMD PTE" is a free app that gives you a
nice, interactive, PERIODIC TABLE. It may also be available for
Droids, but I'm not sure.
Answers to today's DO NOW
More announcements for this week:
Wed - Quiz 2.3 - Ch 8 (70%) and all the other chapters
(30%) we have covered this yr (60 pts)
Th - Memorize Ions - 2 - See "Quiz/Test Reviews" on my
website for details (10 pts)
Fri - Standard 1 CFA Quiz (10 pts)
1. Demo 2 Mg + O2 ---> 2 MgO
2. vid V +5 +4 +3 +2 change color vid.mpg - V forming different oxidation
states with different colors from
Interactive Chalkboard - Ch 6 (Periodic Table)
3. Use 2 quizzes: Naming Ionic Cmpds & Lattice Energy included in this file, following
this page
Following are 2 gradable quizzes:
1. Naming Ionic Cmpds (4 q's)
2. Lattice Energy (5 q's)
Naming Ionic Cmpds - responder quiz
«grade»
Grade:
Name Ionic cmpd - responder quiz
Subject:
«date»
Date:
f
What is the correct formula
for Barium phosphide ?
1
A
BaP
B
Ba3P2
C
Ba2P3
D
BaP3
2
What is the correct formula
for Magnesium bromide ?
A
MgBr
B
Mg2Br
C
Mg2Br2
D
MgBr2
3
What is the correct formula for
calcium carbonate?
A
CCO3
B
C2CO3
C
CaCO3
D
Ca2CO3
4
How would you name this ionic compound?
A
nitrile acid
B
acetate of ammonia
C
ammonia acetate
D
ammonium acetate
NH4C2H3O2
Lattice Energies - Notes for understanding
Smaller ions ===> larger negative value for lattice
energy (meaning more lattice energy)
Larger ions ===> smaller lattice energy (meaning
smaller negative value for lattice energy)
Charge of ion - larger charge (+ or -)
====> more lattice
energy
Lattice Energy
«grade»
Grade:
4 q's on LE
Subject:
«date»
Date:
1
Answer?
A
B
C
D
Explanations given below
Formula of
cmpd
cation
relative
strength
anion
relative
strength
Total
relative
strength
MgCl2
Mg2+
Cl1-
3
AlCl3
Al3+
Cl1-
4
NaCl
Na1+
Cl1-
2
LiCl
Li1+
Cl1-
2
2
Answer?
A
B
C
D
Explanation given below
Formula of
cmpd
cation
relative
strength
anion
relative
strength
Total
relative
strength
BP
B3+
P3-
6
Al2O3
Al3+
O2-
5
MgO
Mg2+
O2-
4
B2O3
B3+
O2-
5
3
Answer?
A
MgO
B
SrCl2
C
LiF
D
AgCl
Explanations given below
formula of
compound
cation relative
strength
anion relative
strength
total relative
strength
We don't need to check the sizes of the anions, because there are no ties
for largest charge total
4
Answer?
A
B
C
D
Explanation given below
Formula of
cmpd
cation
relative
strength
anion
relative
strength
Total
relative
strength
LiF
Li1+
F1-
2
LiBr
Li1+
Br+
2
LiI
Li1+
I1-
2
LiCl
Li1+
Cl1-
2
So the decision goes to the relative
size of the anion!
5
Which of the following is more important
in deciding the relative lattice energy of a
compound?
A
Size of the ions?
B
Charge total of the aions?
This quiz should only count for 4 questions, question 5
had problems to begin with and period 5 didn't have time
to answer
11/29/2011 Standards: 2 (Chemical Bonds)
Objectives:
a. Review any HW not reviewed yesterday.
b. Review for Quiz 2.3 (Ch 8 + Density - 2 problems)
DO NOW:
1. Come up with 5 problems you need help with from HW given on Ch 8
2. If density = 3.2 g/mL and volume = 22.1 mL, what is mass?
HOMEWORK:
1. Quiz 2.3 On-Line Practice Quiz. Copy question or summarize question, give
your answer, wich may include a page# (10 pts) Std: MISC
2. Brush up your Help Sheet for tomorrow's Quiz 2.3 (Ch 8 + Density)
=========================================================
STAMPS:
Journal 11/28
1. Ch 8 Ch Assess, p. 236 47-59 (leave out 56 & 58) (5 pts) Std MISC
2. Help Sheet Quiz 2.3 (5 pts)
On-Line
ChemThink – Ionic Bonding Tutorial and Quiz Questions (10 pts) is due today.
correct answer, and reason for
3 minutes
How you dress sends a MESSAGE to others (one thing leads
to another):
Young ladies - dressing immodestly (skin showing in
suggestive places) attracts boys to only one thing
Young Men - you too! If all you want is surface
relationships that mean nothing, what will married
life be like for you? Remember there is other stuff
you need to know about young women!
Suggestive dress contributes to porn problem which is an addiction!!!!
Review of Ch 8 (Quiz 2.3)
1. Electron Affinity
2. Molecules are electrically neutral
(total (+)'s = total (-)'s)
3. Properties of ionic solids - strongly affected by LE (lattice energy)
melting point vs LE (directly proportional)
boiling point vs LE (directly proportional)
hardness vs LE
(directly proportional
4. Ionic Bonds are strongest of all bonds
5. Chemical formula of ionic bonds
Electronegativity - ability of an atom in a molecule to
attract the bonding electrons.
Ionization Energy - energy required to remove electrons
from the valence shell of an atom.
Electron Affinity - energy given off when an electron is
accepted by a non-metal.
All have the same trend
Use lesson plan for 11/18 - alloys, lattice structures
(substitutional & interstitial)
3-D Crystal lattice
http://michele.usc.edu/105a/crystal/example.html
Copy the HW from my website
11/30/2011 Standards: Many
Objectives:
a. Check for understanding with Quiz 2.3 - Ch 8.1-8.4 + density
DO NOW:
1.
Clear desks and floor, all materials to side or back counters.
Desks: scantron, help sheet, pencil, eraser, calculators, scratch paper
HOMEWORK:
1. SN Ch 9.1 p. 107-110 (5 pts) Std 2
Due tomorrow
Due
Tu next
2. ChemThink - Covalent Bonding Tutorial
(3 pts) and Questions (7
pts)
Std wk
2
===========================================================
STAMPS:
NONE
BASKET:
Quiz 2.3 On-Line Practice Quiz (5 pts) Std MISC
Students doing arranging:
1. put in 5 piles
Help Sheet
scratch paper
Quizzes
Scantrons
Periodic Charts
2. Arrange
Periodic Charts - smallest #'s on top
`
Tests - smallest #'s on op
Scantrons - smallest #'s on top
3. Fan tests so all #'s can be seen
12/1/2011
Standards: 2 (Chemical Bonding)
Objectives:
a. Check for understanding: Mem Ions 2 (11 ions)
b. Be able to understand questions from SN Ch 9.1
c. Prep for Standards Quiz for Std 1
DO NOW:
1. Review for quiz on your own as I stamp. Then, Clear desks,
floor, etc - everything on side counters for
HOMEWORK:
1. Page 244 PP's 1-5 (5 pts) Std 2
(re-watch video on Covalent Bonding - "Lewis Structures of
covalent Molecules for beginners - Part 1" as shown in class
today
2. Structure of the Atom - Std 1 Quiz tomorrow (20 pts)
======================================================
STAMPS: Journal 11/29 (day before Quiz 2.3)
1. SN Ch 9.1 p. 107-110 (5 pts) Std 2
Lewis Structures of covalent Molecules for beginners - Part 1
Lewis Structures For Covalent Molecules
Atoms
Lewis Structure
H2O
Valence Electrons
O
H2
O
formula
H
Std 2
H
Total
bonding
Unshared
A bonding pair of electrons =
Check 2 things to have a correct Lewis Structure
1. Every atoms has 8 electrons except H (only needs 2)
2. Total electrons in Lewis Structure = total of all valence electrons
from the individual atoms.
Pre-Quiz Review
«grade»
Grade:
Standard 1
Subject:
«date»
Date:
1. The atomic number in the periodic table is
lowest in the
A
B
upper left corner
upper right corner
C
lower left corner
D
lower right corner
1
Answer
?
quadrants of periodic chart
2. The electronegativity of an element
indicates the relative ability of its atoms
to attract electrons in a chemical bond. As
you move down a group in the periodic
table the atomic number:
increases and the electronegativity
increases.
B. increases and electronegativity decreases
C. decreases and the electronegativity increases
D. decreases and the electronegativity decreases
A.
electronegativity
2
Answe
Ar?
BC D
3. Which of these elements has the weakest
attraction for electrons?
3
Answer
?
A. Boron ( atomic number = 5)
B. Calcium ( atomic number = 20)
C. Hydrogen ( atomic number = 1)
D. Sulfur ( atomic number = 16)
A B CD
4. When a lithium atom loses its electrons,
how does its density and
weight change?
A. Its density and weight both decrease slightly.
B. Its density decreases significantly, and its weight
decreases slightly.
C. Its density and weight both decrease significantly.
D. Its density increases significantly, and its weight
decreases slightly.
4
Answ
AB C D
er?
12/2/2011
Standards:
Objectives:
a.
DO NOW:
1.
HOMEWORK:
1.
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STAMPS: