Quarter 3 Blog January 30th, 2014

What we did in class? January 30, 2014

1. We first checked in homework (Mrs. Friedman gave credit to everyone who attempted the worksheets because she knew that they were challenging). 
2. Mrs. Friedman also announced that there will be a quiz tomorrow: 6 different Lewis Structures and deciding what the molecular geometry is. ( THERE WILL BE NO WEDGE/DASH ON THE QUIZ)
3. We got 3 new handouts ( which will be in the handouts folder on moodle). The titles of the worsheets are: VSEPR #3, valence shell electron pair repulsion(VESPR) Theory and the second page to this worksheet. 
4. Next we went over a few problems from the homework. ( A complete answer key to last nights homework will be posted in moodle). (BTW last nights homework was supposed to ask about clouds not pairs) for example it should say total electron clouds not pairs. 
5. We then completed yesterdays notes.( WHICH ALSO IS ON MOODLE) 
6. We also took some new notes about WEDGE AND DASH DRAWINGS.(ALSO ON MOODLE)

YESTERDAY'S NOTES CONTINUED.............(GEOMETRY)

VSEPR CODE                                             #CLOUDS                                            GEOMETRY
AX2                                                             2 Clouds                                               Linear (180)

AX3                                                             3 Clouds                                              Trigonal Planar(120)
AX2E                                                           3 Clouds                                              Bent (about 120)

AX4                                                             4 Clouds                                               Tetrahedral (109.5)
AX3E                                                           4 Clouds                                  Trigonal Pyramid(about 109.5)
AX2E2                                                         4 Clouds                                               Bent (about 105)

AX5                                                             5 Clouds                              Trigonal bipyramid(120,90,180)
AX4E                                                           5 Clouds                               Seesaw (180,90,120)
AX3E2                                                         5 Clouds                                T-Shaped (180,90)
AX2E3                                                         5 Clouds                                 Linear (180)

AX6                                                             6 Clouds                            Octahedral (180,90)
AX5E                                                           6 Clouds                           Square Pyramid (180,90)
AX4E2                                                        6 Clouds                            Square Planar (90)



Today's Notes: (WEDGE AND DASH DRAWINGS)
                                                                                                              

YOU TAKE THE LEWIS STUCTURE AND CAN SHOW IT 3d -------->like the pink box(above)

• IF YOU DON'T UNDERSTAND MY WEDGE AND DASH DRAWINGS NOTES, GO TO MOODLE  :) 

    TODAY'S HOMEWORK:

•  Do the VSEPR #3 WKSH
• Do two webassigns by 11:59 pm 
• Check last nights hw on moodle with the answer key
• Study for the quiz ( it may be a partner quiz or it might not be) MRS. FRIEDMAN is still deciding. 

The next blogger will be.................    Nicole Antony 

NOW FOR SOME JOKES:

Wednesday, Jan. 29, 2014

Today we:
     Turn in Molecular geometry packet
     Checked in homework from last week: What is a Bond? How and Why Does it Form? worksheets and         notes on the two videos Bonding Models and Lewis Structure and Covalent Bonding Video
     Picked up two worksheets titled Molecular Shapes from Lewis Structure

Molecular Geometry:
VSEPR- "valence shell electron pair repulsion"
     -"clouds" of electrons repel each other and position themselves as far apart as possible  around a central           atom
     - there are two times of electron "clouds" :
            a pair  of electrons in a bond
            a pair of unbonded electrons, aka, a lone pair
     2 Questions:
          1. How many clouds are around the central atom? (How are they arranged?)
          2. How many clouds are bonding and how many are lone pairs?

Geometries:
A - central atom
X - terminal atoms
E - lone pair on central atom

VSEPR code                                         # of Clouds                                        Geometry                             
AX_2                                                      2 Clouds                                          linear (180deg)

AX_3                                                      3 Clouds                                          trigonalplanar (120deg)
AX_2E                                                                                                            bent (~120deg)

AX_4                                                                                                              tetrahedral (109.5deg)
AX_3E                                                    4 Clouds                                          trigonalpyramid (~109.5deg)
AX_2E_2                                                                                                        bent (~105deg)

There are more but this is as far as we got in class today.
If the homework includes Lewis Structures with more than 4 clouds, I'm sure you can Google and VSEPR Chart and use that!

Ms. Friedmann showed us a molecule simulation in class. She posted that under Unit 7 on Moodle so feel free to play around with it!

Homework:
     The two worksheets we picked up in the beginning of class
     Two Webassigns due tomorrow night at 11:59



NEXT BLOGGER: Gemini Plamoottil

Blogger

ChemBlog 1/24/14

Conrad Mordzinski

1. Check over homework (two worksheets). We will check these in on Monday

2. Partner Quiz!! Choose one other person to work with.

3. Grab the Molecular Geometry packet, this is homework for monday.

4. Have a greeeeeaaat weekend! 

The next scribe is Francine Yoon

Class Blog 1/23/14

Chem Blog 1-23-14

What We Did:

• We finished the notes we started yesterday on Covalent Bonding
• We went over the problems we were assigned for homework yesterday
• We started the “What is a Bond” worksheet.

The completed notes for covalent bonding should be posted on the moodle.

Homework:

• Finish the “What is a Bond” worksheet we started in class
• 1 webassign due TONIGHT at midnight
• Watch two videos entitled “Video on Covalent Bonding” and “Bonding Models and Lewis Structures” and take notes of them
• Mrs. Friedmann will be checking in these notes tomorrow for homework points

Next Blogger: Conrad M.

Daniel Schiller 1/22/14 Friedman Blog Period 4

Daniel Schiller

• We started out the class by picking up the handouts that can be found in the handouts folder.

• These consist of:

• Honors Chem-Practicing Building Lewis Structures

• What is a bond? How and Why Does it Form?

• Next we checked in the homework from 1/21/14 which was the Ionic Bonding Intro worksheet.

• We then talked about broken noses and how Mrs. Friedman had some college days filled with drama, attitude, and victory.

• After, we reviewed the Ionic Bonding Intro worksheet from the night before.

• We then talked about the classes that we were thinking about choosing science during Junior year.

• Next we took notes on several things all of which can be found in the Unit 7 Notes Folder:

• Covalent Bonding Notes 

• How to Draw Lewis Structure Notes

• The Homework Tonight:

• Practice Building Lewis Structure Worksheet

• Webassign due tomorrow night!!!

• Next Blogger is Conrad Mordzinski

Class Blog 1/21/14

Welcome back Period 4!!

Mr. Lieberman's special announcement:

We have a special next year thanks to the block schedule...

Since we will have another period, it is possible to take AP Chemistry along with physics!

This will begin to open doors for those who are interested in studying science.

But keep in mind...

The leap from honors chemistry to honors physics is HUGE. Honors physics is very independent and fast paced.

So make sure when you are considering honors think about:

priorities

scheduling

TIME

Mrs. Friedmann will ask us to write down course preferences regarding next year tomorrow in class.

We picked up five handouts- available in Unit 7 Handouts folder.

INTRO TO IONIC BONDING

Mrs. Friedmann's class notes are on moodle!

Ionic Bonds:

Bonds→ glue that sticks atoms together to form compounds

There are several kinds.. one kind is ionic

We already know how to...  

write ionic formulas (i.e. NaCl)

write names of ionic compounds (i.e. sodium chloride)

Ionic bond- one that occurs between a METAL and a NONMETAL.

METALS: form cations (positive)

NONMETALS: form anions (negative)

*there is a TRANSFER of electrons from the metals to the nonmetals

metals always lose electrons

nonmetals gain the electrons that metals lost

Keep in mind...

octet rule: full s and p orbitals in the highest energy level

Example:

Na (1s22s22p63s1)

more stable if it loses an 1 electron

easier to get rid of 1 electron rather than gain 7

...it is picked up by another element

Cl (1s22s22p63s23p5)

more stable if it gains 1 electron

Na- neutral when it has 1 valence electron

Cl- neutral when it has 7 valence electrons

⇒ Na with a positive charge and Cl with a negative charge forms a perfect octet

now we have a positive and negative particle (they attract each other)

--> they stick to each other (ionic bond)

Ionic bond is the electrostatic attraction between a cation and an anion

Homework: 

1) finish 2 worksheets we picked up in class titled "Intro to Ionic Bonding"

2) Chemthink: ionic bonding (we already completed)

tutorial and questions (do not have to take notes in journal)

The next scribe is Danny Schiller.