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Archive – Q3 week 2 – 18-19

week 2

Week of 2/4 – 2/8 – 

 

2/4 – Monday – period 2/3

1.  Lattice Energy – Energy diagram
 
     Ionic bonding, principles, Coulombs law
 
Bonding presentation to slide 19 – polar bonds, non- polar bonds, ionic
 
    a) conducting electricity – did not get to the conduction demo = free ions
    b) crystal structure of ionic compounds
    c) Need to show dissolving ionic compounds = Free ins
 
    d) partial charges, dipole moments, overall dipole moment =
         need to show slide polar slide in bonding demo
 
2. Homework review – 
 
       a) sp3 worksheet reviewed for period 2/3 for molecular geometry of tetrahedral family:
            how tetrahydral looks in 2D vs 3D, NH3 and Water
 
       b) sp3 worksheet (non sp3 – carbon – hydrogen bonds) = polarity
 
       c) Ethane, Ethene, Ethyne comparison – when double and triple bonds can occur
sp3 hybridization key p.pdf
View Download
 
Ethane, Ethene, Ethyne Comparison worksheet key p.pdf
View Download
                            period 4 –
 
1. Revisit Lattice Energy – Energy diagram
 
 Ionic bonding, principles, Coulombs law
 
Bonding presentation to slide 19 – polar bonds, non- polar bonds, ionic
 
2. Homework review – 
 
Bonding presentation to slide 19 – polar bonds, non- polar bonds, ionic
 
    a) conducting electricity – did not get to the conduction demo = free ions
    b) crystal structure of ionic compounds
    c) Need to show dissolving ionic compounds = Free ins
 
    d) partial charges, dipole moments, overall dipole moment =
         I did show the overall dipole moment charge.
 
       a) sp3 worksheet reviewed for period 2/3 for molecular geometry
 
       b) sp3 worksheet (non sp3 – carbon – hydrogen bonds) = polarity
 
      
  

Bonding:

Bonding

Lattice Energy:

Lattice Energy – Born Haber Cycle

VSEPR Grodski Balloons:
PHET – Polar molecules animation –
2/4 Monday Homework:
 
1:  Please complete the Hybridization identification worksheet  1617.pdf
and review with key below:
 
I made a mistake in the key.  The carbon not highlighted in Ibuprofen should be sp3 .  
Thanks Ashley! 
 
Also NO3-1   has a molecular geometry that is trigonal planar!
Hybridization identification worksheet 1617.pdf
View Download
 
Hybridization identification worksheet key p 1617.pdf
View Download
 

2/5 – Tuesday –  period 2
 
 
1. Ionic demo conductivity AND polarity demo
 
2.  Show slide 18 and 19 = overall dipole moments , debye
 
 – Bonding presentation 13 – 29 today – 
 
3. Polarity Phet – PHET  polarity – dipole moments, partial charges
 
4. Complete the polarity discussion with 
 
    a) showing overall dipole moments for the molecules in the homework 
    b) Polyatomic ion – Table E in presentation Lewis structures (model a couple)
    c) Identify hybridization and lewis structures that are PERIODICALLY similar.
 
Hybridization identification worksheet key p 1617.pdf
View Download
 
Bond Energy and Bond length discussion with table below:
Carbon – Carbon bonds, electronegativity in HF, HCl, HBr, HI. Why is HI strongest acid?
 
Pi bonds vs sigma bond in C2H6,  C2H4,  C2H2
 
 View Flash animation:   Link to flash
 
      
   – WATER VS CARBON DIOXIDE – The meaning of Life!
                             – period 3/4
 
1. Ionic demo conductivity/ polarity demo
 
 – Bonding presentation 13 – 29 today – 
 
2.. Polarity Phet – PHET  polarity – dipole moments, partial charges
 
3. Complete the polarity discussion with 
 
    a) showing overall dipole moments for the molecules in the homework 
     b) Polyatomic ion – Table E in presentation Lewis structures (model a couple)
    c) Identify hybridization and lewis structures that are PERIODICALLY similar.
Bond Energy and Bond length discussion with table below:
Carbon – Carbon bonds, electronegativity in HF, HCl, HBr, HI. Why is HI strongest acid?
 
Pi bonds vs sigma bond in C2H6,  C2H4,   C2H2
 
 View Flash animation:   Link to flash
    
– WATER VS CARBON DIOXIDE – The meaning of Life!
    used the PHET animation below to show the polarity, dipole moments of a 3 carbon system, linear first then bent with outside with same high EN. I compared that with COlewis dot structure and molecular orbital sketch to illustrate how we can determine polarity by understanding geometry of orbitals. Especially the fact that central lone pairs will cause the linear structure to bend.  Also pi bonding and sigma binding review.
Formal Charges with Chlorate geometry 1718.pdf
View Download
Bond Energy and length data:  
Bond energy = the energy needed to break bonds = Bonds are stable thus Bond energy is always positive.
 
Bond length = distance between nuclei of atoms in a bond. 
                              Stronger the bond, stronger the attraction to the electrons between the bonded atoms and
                              this will lead to a shorter bond length.
 
                                   Stronger the BOND Energy the shorter the BOND length!
     π (pi) bonding occurs with every multiple bond between 2 atoms but it does not double or triple the bond 
energy because π bonding contains electron density that IS NOT between 2 nuclei.  I often describe π 
bonding as bonds that are perpendicular to the 2 nuclei that are simultaneously attracting the electrons. 
This is weaker than if the electrons are located exactly between the 2 nuclei in σ (sigma) bonding.
  
2/5 Tuesday HW:  FORMAL CHARGE!
 
Formal charges/ resonance – 
1: We use formal charges to evaluate lewis structures so that we pick the most stable and realistic structure.  THIS IS WHAT TONIGHT’s HOMEWORK is on!
 
2: In resonance the formal charges will be the same for all elements except that they will be in different locations.  
3: Formal charges will  help verify the overall charge on polyatomic ions
1. Please view the lecture below on formal charges on the first side ONLY of the Formal Charges with Chlorate geometry 1718.pdf worksheet.
 
Formal Charges with Chlorate geometry 1718.pdf
View Download
Formal Charges with Chlorate geometry 1718 key p.pdf
View Download
 
Classroom lecture on Formal Charges:
End of Tuesday!

2/6 – Wednesday
 
Formal Charge Notes:
 
*Formal Charges will help us determine how many double bonded oxygen in more advanced structures (chlorate structures). we keep adding the double bonds till the central atom will become a formal charge of zero.  Remember that Formal Charges are “bookkeeping values”  that help us determine the most accurate Lewis Structure.  They are part of this valence bond theory that is not perfect in explaining or predicting the properties of all molecules but without experimental data you  MUST follow formal charge rules:
 
1: Best Lewis Structure will have the more atoms at or near zero (atoms are using their valence electrons in the drawn Lewis structures).
 
2.  If given a choice the most Electronegative Atom will have a negative value (that atom will gain the electron because of its larger coulombic attractions for electrons).
 
3.  If the formal charges stay constant for different Lewis Structures for the same molecule or ion then you have Resonance.
 
                    – period 2/3,   period 4
 
1.  Review Hybridization homework Monday night
   
Hybridization identification worksheet key p 1617.pdf
View Download
a) showing overall dipole moments for the molecules in the homework 
     b) Polyatomic ion – Table E in presentation Lewis structures (model a couple)
    c) Identify hybridization and lewis structures that are PERIODICALLY similar.
Bond Energy and Bond length discussion with table below:
Carbon – Carbon bonds, electronegativity in HF, HCl, HBr, HI. 
 
2.  Potential Energy Internuclear distance Diagram
      Use diagram to explain Bond Energy and Bond Length with chart posted above
 
Potential Energy Internuclear distance Diagram.pdf
 
Pi bonds vs sigma bond in C2H6,  C2H4,   C2H2
 
 View Flash animation:   Link to flash
    
3.  Formal Charge Review:  Model 1st problem then use presentation.
                                                       Pick the best Lewis Dot Structure
 
Formal Charges with Chlorate geometry 1718 key p.pdf
View Download
4.  Complete NO3-1 polyatomic i0n lewis structure and discuss resonance and introduce Bond Order.
                 Bond Order =     All the bonds in a molecule (pair of electrons between atoms)
                                                    All the regions in the Lewis Dot Diagram that have bonds.
 
5. Expanded octets – complete back side of Formal Charges with Chlorate geometry 1718.pdf in class.
     add Bond orders, formal charge/ resonance 17 – 21 slides in Resonance Presentation
Expanded octets
    a) elements that are beyond row 2 CAN have more than 8 electrons because when n = 3 there are d       
        orbitals. (expanded octets).  They can also follow the octet rule.
 
     b) elements that have valance electrons in n = 2 cannot have expanded octets.
 
 
 
Optional Lecture on the Chlorate geometry: 
  This is what we did in class on the backside of the Formal Charges with Chlorate geometry 1718.pdf  worksheet.

Extra resource on Formal Charges:

              
2/6 – Wednesday Homework:
 
PERIOD 2/3 students:
 
1. Please complete the backside of last nights worksheet. We completed all structures except for the last one.  Use the key below to review the last lewis structure. Start the video, Chlorate geometry at about the 42 minute mark.
 
If you are lost on how to complete the backside PLEASE VIEW the Chlorate/Chlorate Geometry Lecture  below to watch how I complete these advanced lewis diagrams that require formal charges.
Formal Charges with Chlorate geometry 1718 key p.pdf
View Download
2: Watch the Hybridization lecture – sp3d, sp3d lecture below:
 
3:  Then complete  the Hybridization identification worksheet 2 expanded octets.pdf and start this worksheet with another video that models the first few chemicals and then review with the key.
What would be helpful is a chart of the new geometries that are associated with 2 new hybrid orbitals:
 

Expanded octet geometry comparison chart.pdf
View Download

Hybridization identification worksheet 2 expanded octets.pdf
View Download
 
Hybridization identification worksheet 2 expanded octets.pdf KEY.pdf
View Download
 
PERIOD 4 Students: I know that I am asking a lot here.  We have 2 period tomorrow to review.
 
1. Please complete the backside of last nights worksheet. Use the key below to review the last lewis structure. 
 
If you are lost on how to complete the backside PLEASE VIEW the Chlorate/Chlorate Geometry Lecture  below to watch how I complete these advanced lewis diagrams that require formal charges. Please make sure you can identify resonance!
Formal Charges with Chlorate geometry 1718 key p.pdf
View Download
2: Watch the Hybridization lecture – sp3d, sp3d lecture below:
 
3:  Then complete  the Hybridization identification worksheet 2 expanded octets.pdf and start this worksheet with another video that models the first few chemicals and then review with the key.
 
Key posted above.
 
Tonight’s Lectures:
Chlorate/Chlorate Geometry Lecture (backside of last night’s homework):
  This is what we did in class on the backside of the Formal Charges with Chlorate geometry 1718.pdf  worksheet.
 
Hybridization lecture – sp3d, sp3d :
 
Lecture that models a few of the chemicals in the 
Hybridization identification worksheet 2 expanded octets.pdf worksheet:
Bonding Tables – molecular geometry and Hybridization p.pdf

View Download

 
PHET Animation: VSEPR Valence Shell Electron Pair Repulsion Theory
 
TRY ME with expanded octets!

 

End of Wednesday..

2/7 – Thursday – period 2
1.  Chlorate geometry review – last structure from backside, formal charges tell us when to stop adding oxygens which make the formal charges of oxygen zero (which is preferred!).  Bond order of resonant structures?
Resonant structures have delocalization!!!
 
Quick run through Bonding presentation –  ( slides 1 – 48) or polyatomic and resonance presentation.
 
1.  Review expanded octet worksheet for sp3d hybridized.
2.  sp3d2 hybridization electron domain geometries and molecular geometries Reviewed.
 
3.  VSEPR (Valence Shell Electron Pair Repulsion ) Balloons – 
 
4.  Surprise quiz is take home of period 2.
 
Surprise quiz (unless you read this on writing lewis diagrams, formal charge, resonance, polarity, bond angles, hybridization, pi and sigma bonds, Mandarin)
                                     period 3/4 – 
 
1.  Chlorate geometry review – last structure from backside, formal charges tell us when to stop adding oxygens which make the formal charges of oxygen zero (which is preferred!).  Bond order of resonant structures?
Resonant structures have delocalization!!!
 
Quick run through Bonding presentation –  ( slides 1 – 48) or polyatomic and resonance presentation.
1.  Review expanded octet worksheet for sp3d hybridized.
2.  sp3d2 hybridization electron domain geometries and molecular geometries Reviewed.
 
3.  VSEPR (Valence Shell Electron Pair Repulsion ) Balloons – 
 
4.  Surprise quiz (unless you read this on writing lewis diagrams, formal charge, resonance, polarity, bond angles, hybridization, pi and sigma bonds, Mandarin)
 
5. Review of Surprise quiz.
                           
2/7 – Thursday Homework:
 
The Periodicity Test Key is posted in powerschool. 
 
I will review test period period 2 tomorrow for period 2/3 class.
Period 2 class received their graded Periodicity tests today
 
I will review Periodicity test Monday period 3 Monday for period 3/4 class.
Period 4 will get their Periodicity teats back tomorrow.
 
Extra credit for bonding will be on periodicity.
 
1:  Review your quiz with me in the lecture below or the key below:
       If you were in period 3/4 today this was the quiz you took. Please review.
      
 
Molecular model quiz – Mock 1718 key.pdf
View Download
 
Molecular model quiz – Mock 1718.pdf
View Download
2. Here is another Practice Quiz to practice on.
 
molecular model quiz B Key.pdf
View Download
 
molecular model quiz B Blank .pdf
View Download
3. Study for Bonding Test Tomorrow – (Slides 1 – 48 on Bonding presentation)
 
 
Test Topics – 
 
Lewis Diagrams (molecules and polyatomic ions), determining Hybridization (sp, sp2 , sp3)  electron domain geometry, molecular geometry, bond angles, polarity, drawing orbital sketches
 
Sigma, pi bonds, 
Bond order (total bonds / places that can have bonds).
 
Formal Charges to determine the best lewis diagram, lattice energy 
There will be NO sp3d or sp3d2 on the 1st bonding test.
 
THERE WILL BE NO
 
        a) Expanded octets with sp3d,and sp3d2 hybridization
        b) A POLYATOMIC ion like the chlorate geometry worksheet –
        
        c) Dipole moments –  Slide 22 – 34 – 
 
        d) Potential Energy Internuclear distance Diagram – 
                                                                                   
But these extra topics will be included on Monday’s test.
 
Hybridization worksheets:
 
 s  and 1 p orbital “mixed”
(2 unhybridized p left)
triple bonds possible = 2 
π, 1 𝞼
 SP hybridization.pdf
View Download
 SP hybridization KEY p.pdf
View Download
 Link to sp lecture
 s and 2 p orbitals “mixed”
        (1 unhybridized p left)
double bonds possible = 1 
π , 1 𝞼
 sP2 hybridization.pdf
View Download
 SP2 hybridization KEY p.pdf
View Download
 Link to sp2      lecture
 s and 3 p orbitals “mixed”
(0 unhybridized p left)
single bonds only = 0 
π , 1 𝞼
 SP3 hybridization.pdf
View Download
 sp3 hybridization key p.pdf
View Download
 Link to sp3     lecture

 Hybridization review sp, sp2 and sp3:

 Hybridization Comparison Chart Intro.pdf

 Lecture on the  Ethane, Ethene, Ethyne Comparison.pdf worksheet:

 Ethane, Ethene, Ethyne Comparison.pdf

 
Ethane, Ethene, Ethyne Comparison worksheet key p.pdf
View Download
Orbital Sketch Lecture:
 
I demonstrate how to sketch the orbital diagrams of the following molecules (non-expanded octets):
 
CH4,   CH3F,   PCl3,   H2S,   C2F6,   C2Cl4,   C2H2,   CO2
Link to Lattice Energy Presentation.
Look above under Monday for Formal charge resources….
 
 
End of Thursday!!

 

2/8 – Friday – period 2/3
1. Review Periodicity Test – You will take the extra credit – Monday or Tuesday
2:  Surprise Mock quiz
2: Bonding Test (2nd period)- one period test
                               period 4 – 
 
1:  Bonding Test – 1 period test –  one period test
2. Will give back periodicity test – We will review this test Monday – 
     Monday you will take Bonding Extra Credit on periodicity
 
2/8 – Friday Homework:  Monday’s test is the best out of 2!!!!
 
1: I will grade and send you your test through email. I will link the key in powerschool.
 
I will email all tests back!
 
2:  Please watch the review video that I will post that will go over the test.
 
3.  Bonding Test 2 –  Monday will be on the same material INCLUDING RESONANCE, Expanded Octets , sp3d. sp3d2, and formal charges. Review the expanded octet diagram worksheet.  
REVIEW the quizzes and the bonding test 1!!
 
4.  Review concepts of dipole moments.  The greatest difference in Electronegativity.
 
 
 
Many students missed questions left questions 2,3,4, and 5 blank.  Please complete the form below if you think you may be one of them! 

Missed question on bonding test 1

Bonding Test 1 review video:  – the key IS NOW the bonding test 1 is posted in Power school
I have emailed everyone’s test as of 1:00 pm Saturday.

 

 

Monday’s test will have the same material PLUS
 
        a) Expanded octets with sp3d,and sp3d2 hybridization
        b) A POLYATOMIC ion like the chlorate geometry worksheet –
        
        c) Dipole moments –  Slide 22 – 34 – I will review in period 1 tomorrow
                                                                                  Period 4 class – we did this today
        d) Potential Energy Internuclear distance Diagram – I will review in period 1 tomorrow
                                                                                   Period 4 class we have already completed this
 
Potential Energy Internuclear distance Diagram.pdf
View Download
 
 
Formal Charges with Chlorate geometry 1718.pdf
View Download
Formal Charges with Chlorate geometry 1718 key p.pdf
View Download
 
Lecture on the Chlorate geometry: 
 
 
 
Dipole, Resonance, polarity review:  Slide 22 – 34
 

Resonance Presentation and Formal Charges

sp3d and sp3d2 hybridization resources are posted above
Whew!!!!! End of week 2!