Week of 2/20

Monday:

No school b/c President’s day

Tuesday:

You all took your atomic structure test.

Wednesday:

Intro to bonding notes, ions formed by transition metals, ionic radii, ionic bond strength. Here’s the notes.

HW: review what we learned today. Start google classroom questions.

Thursday:

Trends in ionic and metallic melting points + Born-Haber cycle notes.  We watched a video on formation of sodium chloride to show the energy given off in this reaction. That brought up some questions about sodium in its natural state so we watched a bit of this video.  Here’s the notes for today.

HW: Work on google classroom questions, do #1,23 on page 15 in packet, read 10-12 to learn about alloys.

Friday:

Today we reviewed born-haber cycles by having your work in groups making posters for the last few problems on page 15-16.  The second half of class I lectured a bit on coordinate covalent compounds, you practiced naming, identifying ligands, coordination numbers and charges on the metal ion.  No naming will be on your test – just the vocab: ligand, coordination number and interpreting the charge of the metal ions.   Next we talked about why transition metals are colored in solution and then n the last 15 minutes we did a lab using complex ions to distinguish Iron (II) from Iron (III).  Nothing to write down – was just an exploration lab (so don’t worry if you were absent).

HW: Review.  Test is on TUESDAY!

Week of 2/13

Monday:

Today we started with review of atomic structure (first few pages of packet) and then worked on Coulomb’s Law ChemActivity. During the 2nd half we reviewed periodic trends including interpreting graphs and using pattern in IE to predict group or valence electrons of a given element.

Tuesday:

Today we reviewed with a couple of practice AP problems from the packet and then finished the PES packet. Most of you had to finish some of the PES for homework.

Wednesday:

Today we started with review of a couple more AP problems on page 43 (2005 and 2008) then I checked page 21 while you guys worked on pg 22.  That launched us into the lecture on electron configurations and orbital diagrams because the PES is evidence that the Bohr model needs refinement.  Here’s the notes.  We went over all the theory today and did some practice. Tomorrow will perhaps have a little time for battleship and the exceptions.

#Thursday:

Practice econfigs and orbital diagrams. Battleship + exceptions: pge 30 and 33 in packet

Friday:

e-config vocab, multiple choice practice + other review for test on Wed.

 

Week of 2/6

Monday:

Today we did the buffer capacity lab. I started with the question: What makes a good buffer? After brainstorming for a bit we went with testing 20mL of buffer by adding small amounts of 1 M HCl and 1 MNaOH (in separate trials) until the pH changed by two.  Instructions for lab write-up are on google classroom.  Smart board crashed so I do not have notes from today…

Tuesday:

Reviewed for test – gave you 6 review problems that took all class to solve. Then pointed out the multiple choice

 

What is on the test?

1) Definitions (Arrhenius and Bronsted-Lowery/ conjugate pairs)

2) Strong vs. Weak (memorize strong acids and bases, definitions of strong/weak, acid/base dissociation constants (Ka, Kb), molecular level pictures, rate of reaction)

3) pH calculations (strong vs weak, relationship with Kw and water ionization (dissociation), ice table, allowed assumption so you don’t have to use quadratic)

4) Salt hydrolysis (relative strength of conjugates, determine if solution will be acidic, neutral or basic, write hydrolysis reactions, identify spectator ions, calculate pH, Kw = Ka*Kb)

5) Buffers (weak a/b + conjugate in relatively significant proportion, can use henderson-hasselbach equation to solve for pH, recognize buffer solutions (including 1/2 titration method), explain how a buffer works, molecular level picture)

6) Titration (explain (relate to salt hydrolysis) and solve for equivalence point, how to get Ka from titration curve, what indicator to use given pKa, end point vs equivalence point, buffering region, molecular level pictures)

Sample questions from today’s review session.

Wednesday:

Acid/Base test

Thursday:

Today we started with the Atomic Emission lab from first year chem b/c we skipped it last year so many of you hadn’t learned anything about it!  You measured the wavelengths of all 5 atoms and we briefly talked about why the atoms were different. Here’s a video if you missed it.

Friday:

Work on Bohr Model lab.  Turn in by Tuesday morning.