Log in and select Chem 1A When prompted type the word of the day ionic Ensure when asked if you will share your location you select allow Visit httpslearningcatalyticscom ID: 783734
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Slide1
Slide2Visit:
https://checkin.ics.uci.edu
/
Log in and select Chem 1A. When prompted, type the word of the day: ionicEnsure when asked if you will share your location you select “allow”. Visit: https://learningcatalytics.com/Sign in MasteringChemistry account name When prompted, type session ID: 89555625
Remember back 5 rows of even side are no seating zones
Plan ordering for the day:
Finish up periodic trends “exceptions”
Review a couple homework problems together
Alone “quiz” questions for day.
More homework questions
Ionic and covalent bonding
powerpoint
.
Slide3Carbon, Nitrogen and oxygen
Rank in order of effective nuclear charge:
Increasing: effective nuclear charge
C, N, O
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Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
LearningCatalytics
: session
89555625
Slide4Carbon, Nitrogen and oxygen
Rank in order of ionization energy:
Increasing: effective nuclear charge
C, N, O Increasing: ionization energy C, O, N N: [He]2s
22p3
O:
[
He]2s
2
2p
4
C:
[
He]2s
2
2p
2
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Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
LearningCatalytics
: session
89555625
Slide5Carbon, Nitrogen and Oxygen
Rank in order of electron affinity:
Increasing: effective nuclear charge C, N, O Increasing: ionization energy C, O, N Increasing: electron affinity N
, C, O N: [He]2s2
2p
3
O:
[
He]2s
2
2p
4
C:
[
He]2s
2
2p
2
Visit:
https://checkin.ics.uci.edu/
Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
LearningCatalytics
: session
89555625
Slide6Carbon, Nitrogen and oxygen
Rank in order of increasing radius:
Increasing: effective nuclear charge C, N, O Increasing radius O, N, C Increasing: ionization energy C, O, N
Increasing: electron affinity N, C, O
N: [He]2s
2
2p
3
O:
[
He]2s
2
2p
4
C:
[
He]2s
2
2p
2
Visit:
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Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
LearningCatalytics
: session
89555625
Slide7Carbon, Nitrogen and oxygen
Rank in order of increasing electronegativity
Increasing: effective nuclear charge C, N, O Increasing radius O, N, C Increasing: ionization energy C, O, N
Increasing: electron affinity N, C, O
Increasing electronegativity
C,N,O
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Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
LearningCatalytics
: session
89555625
Slide8Ionic and Covalent Bonding
Including Naming
Note: We likely won’t make it to covalent nomenclature, this is the one students find FAR easier than ionic. Please refer to the videos and naming hand out for help with this, and as always office hours, discussions, and
facebook for extra help. If you don’t remember it from high school/1P.
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Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
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: session
89555625
Slide9Homework Review
K
+
, I-….Extending, for MgO, how many electrons are traded?one electron traded
Mg2+, O2-two electrons traded
Slide10“quiz” question (remember, work alone but use whatever you want to help you)
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Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
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: session
89555625
Slide11Types of Bonds
Ionic:
Covalent:
Metallic:“trades” electrons Metal and a non-metal(oversimplified definition)
“shares” electronsnon-metals(oversimplified definition)
delocalized electrons
metals
electrically conductive
collective description of many bonds
NaCl
CO
Ag
Slide12For the Following Choose the Ionic Compounds
(based on previous definition)
NaCl
CH3ClMgCl2SO2Na2SO3
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:
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: session
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Slide13Visit:
https://checkin.ics.uci.edu/
Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
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: session
89555625
Slide14For the binary ionic compounds in the last slide, decide which has more covalent character.
Reminder note from videos (see slides included FYI):
Summary of slides:
The more polarizing power and polarizability lead to a bond with more covalent character.Small highly charged cations have more polarizing power.Large highly negatively charged anions have more polarizability. NaCl
MgCl2
Anions are the same, this won’t
affect covalent character
For
cations
which have more
polarizing power?
Mg
2+
is smaller with a higher charge,
it has more
polarizing power.
Therefore MgCl
2
has more covalent character.
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Word of the day
:
ionic
Ensure
when asked if you will share your location you select “allow”.
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: session
89555625
Slide15Charge
Ion 1
Charge
Ion 2
Internuclear
radius
Lattice Energies
Note: This isn’t and won’t be covered in the videos.
You won’t need to do lattice energy problems any more complex than shown in the next couple of slides.
We will not be calculating the numbers, this equation will be for illustration purposes only.
If
internuclear
distance increases what happens to energy?
If charge increases what happens to energy?
increases
decreases
Not responsible for this quarter!
Just FYI if you are interested.
Slide16Ionic Bond Formation
A) Explain why the lattice energy of silver bromide (903 kJ/
mol
) is greater than that of silver iodide (887 kJ/mol), given that they have a similar arrangement of ions . Hint: How does the charge of Br- and I- compare?Hint: How does the size of Br- and I- compare?Hint: If two
charges are closer together, how is the force required to hold them together affected?
They are the same
I
-
is bigger
Larger distance= lattice energy.
Because the charges are the same, but the
internuclear
distance is larger for
AgI
, it must have the smaller lattice
energy.
Not responsible for this quarter!
Just FYI if you are interested.
Slide17Naming: Ionic
Name the Compounds we identified as ionic on the first problem.
NaCl
MgCl
2
Na
2
SO
3
Sodium chloride
Magnesium chloride
Sodium sulfite
Slide18Naming: Covalent
Name the Compounds below.
SO
2
NO
PCl
5
Sulfur dioxide
Nitrogen monoxide
Phosphorous pentachloride