Chemistry assignments S2 2015
https://www.youtube.com/watch?v=BYsDLKCxKFk
A delightful documentary on Richard Feynman.
Oops! BBC blocked it b/c it's copyrighted. I will try to find another.
Fri, Jun 12: Graph your data. You should have written down the three reactions that take place. Based upon these reactions, you should be able to explain in your lab book why there is a delay in seeing the color change. Monday we must wrap up the lab and plan for the lab to do as a "final exam."
Thurs, Jun 11: Watch the vodcast if you haven't already. Set up your graph of the first color change time with time on the x axis and concentration of KI on the y.
Your concentrations will be calculated by multiplying 0.5M x (mLs of KI you put in) divided by .2 L (the total volume of your mixture.)
Wed, Jun 10: https://www.youtube.com/watch?v=KWJpKNQfXWo
Iodine Clock experiment Slo-Mo
Take notes
Tues, Jun 9: Graph your lab data. No HW tonight.
Mon, Jun 8: https://www.youtube.com/watch?v=xHQM4BbR040
Spectrophotometer explanation - take notes
I will check both Friday and Monday HW tomorrow :)
Fri, Jun 5: Moving on to kinetics:
Vodcast: https://www.youtube.com/watch?v=7qOFtL3VEBc Take notes on separate paper (as I have your lab books!)
Text: pages 572-580: focus more on the concepts, less on the math.
We'll start a new lab Monday.
Thurs, Jun 4: Lab books due tomorrow: Be sure you have completed your error analysis of delta T (experimental vs. back-calculated using the actual heat of solution). Be sure you have a conclusion: did you meet your purpose? Why or why not?)
Wed, Jun 3 Problems 5.60, 5.62, 5.63, 5.64 on page 205. Sorry I posted this so late.
Tues, Jun 2: https://www.youtube.com/watch?v=qD7PDOhqbpM
Mr. Andersen discusses enthalpy of reaction - take notes.
Read pages 177-179 (Section 5.4) in your chemistry textbook. Be ready to apply what you learn Wed.
Mon, Jun 1: New units: Thermochemistry & Kinetics
Start a new lab today. Remember to have closed-toed shoes available.
HW: Vodcast - Mr. Andersen explains exo- and endothermic
https://www.youtube.com/watch?v=L-G7pLufXAo - take notes
Fri, May 29: Do the new Practice Test handed out today. You may have the PV=nRT equation in front of you as well as conversions for different pressure units. These should be easier than the previous set. DUE MONDAY WITHOUT FAIL.
If you are still having trouble, try these vodcasts:
https://www.youtube.com/watch?v=sbUngqBQfao
https://www.youtube.com/watch?v=yXPcK1r2xTE
Solutions to "Practice Quiz" problems:
16 102.4 kPa
18 10 atm
19 0.18 cm3
26 2.65 g/L
27 96 degrees C
28 Air would try to leave the room b/c inc T and dec P = inc V
29 H2 density 0.089 g/L; O2 density = 1.4 g/L
Thurs, May 28: Lab books in to check Graham's Law. Study your practice quiz for a real quiz tomorrow. If we don't finish reviewing today, we will take time tomorrow at the beginning of class to do that.
Wed, May 27: Finish your write up of the diffusion lab. Lab Book check tomorrow. Also, prepare for a mini-quiz using PV=nRT.
Friday, May 22: Watch vodcasts on diffusion, effusion (Graham's Law) and KMT. Take good notes!
https://www.youtube.com/watch?v=g6QuuoTs2Oo
https://www.youtube.com/watch?v=Qsa4aAdpHfY
Thursday, May 21: Study for retake.
Wednesday, May 20: Retake of Acid-Base quiz Friday.
Tonight: Next four vodcasts on the list below.
Tuesday, May 19: Finish writing up your Boyle's Law experiment, including answering the questions on each page of the handout.
Monday, May 18: Watch the first four vodcasts listed. Take notes
Collapsing Can: http://www.graspr.com/videos/The-Collapsing-Can-1
Shall we try a bigger can? http://www.youtube.com/watch?v=Uy-SN5j1ogk&NR=1
How about the biggest can we can find? http://www.youtube.com/watch?v=E_hci9vrvfw
Boiling water with ice: http://www.youtube.com/watch?v=zzVtbvVS2lQ
Cooling gases with liquid nitrogen MIT: http://www.youtube.com/watch?v=ZvrJgGhnmJo
Getting a boiled egg into a bottle: http://www.youtube.com/watch?v=xZdfcRiDs8I&NR=1&feature=fvwp
Gravity has nothing to do with it! http://www.youtube.com/watch?v=BofIBaYk5e0&feature=related
Getting egg OUT of bottle! http://www.youtube.com/watch?v=x--4l-SL77Y&feature=related
Peeps in a vacuum: http://www.youtube.com/watch?v=lfNJJEdKgLU&NR=1
and another: http://www.youtube.com/watch?v=ciPr4Tg9k78&feature=related
Ideal Gas Law: http://www.youtube.com/watch?v=Mytvt0wlZK8&feature=related
Diffusion of ammonia and HCl (animation): http://www.youtube.com/watch?v=L41KhBPBymA&feature=related Diffusion of ammonia and HCl (real deal): http://www.youtube.com/watch?v=WAJAslkwolk&feature=related Putting it all together: http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/gam2s2_6.swf
Update: Test Monday on acid-base.
Friday, May 15: Lab Books due.
Introduction to gas laws (Take notes):
https://www.youtube.com/watch?v=gmN2fRlQFp4
Thursday, May 14: Review for Acid-Base quiz tomorrow. Hooray! A chance to get another grade in the gradebook for quarter 4!! Clemma is coming during the second half of class so we have to work efficiently.
Wednesday, May 13: no class.
https://www.youtube.com/watch?v=XR_0k8JIawY - Demos of the behavior of a buffer system. Take notes.
Plus a night to review old vodcasts and notes.
Tuesday, May 12: https://www.youtube.com/watch?v=rIvEvwViJGk (5:00) Mr.Andersen explains buffers. Also read pages 719-724 of your textbook. For both sources, do not worry about memorizing the Henderson-Hasselbalch equation. We will focus on HOW to use it and what the answer means.
Monday, May 11: Lab books due - to check titration lab. HW: Graph interpretation practice. Update: Whoops! Didn't get to that; did a bit at the end of class only.
Friday, May 8: Practice problems MxV (handout). Lab books will be turned in end of class Monday. We will finish writing up the lab in class.
Thurs, May 7: https://vimeo.com/19007364 Watch this 15 minute video using your handout.
Tues, May 5: Now that we have navigated the sections of the article, go back to the parts you highlighted to indicate "science" (chemistry or biology). Pick ONE of those sections. Find the scientific facts and write them down in your lab book. Then, pose at least one question you have about that section.
Mon, May 4: I will not be in school today. You will be reading an article about the science and politics of chocolate. You will get the article and directions in class. The link is here in case you prefer to read on line.
http://www.newyorker.com/magazine/2007/10/29/extreme-chocolate
We will continue discussing the article on Tuesday and will return to solution & acid-base chemistry shortly thereafter.
Fri, May 1: Read text pages 142-149 (Section 4.5 Concentrations of Solutions). Study the Sample Exercises and do the Practice Exercises without looking at the answers first.
Thurs, April 30: All 3 B&S vodcasts on titration - Notes! Bring questions tomorrow!
Part 3 https://www.youtube.com/watch?v=5ITJ5ry1tbI
Part 2 https://www.youtube.com/watch?v=Kn4KG_GHDFg
Part 1 https://www.youtube.com/watch?v=jPEhN9k0iv0
http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/acidbasepH/ph_meter.html
Wed, April 29: Mr. Andersen review with you...
http://www.bozemanscience.com/ap-chem-030-neutralization-reactions
Misters Bergmann and Sams introduce titrations = our next lab. Listen carefully and take notes!
https://www.youtube.com/watch?v=jPEhN9k0iv0
Tues, April 28: Complete the problem set:
Text pp 711-712: 16.20, 16.37, 16.39, 16.40
Monday, April 27: Watch these two vodcasts and take notes. They will help you with calculating pH from a hydrogen ion concentration and vice versa.
https://www.youtube.com/watch?v=J2Qp9obE6iA Bergmann and Sams: pH & pOH Part 1.
https://www.youtube.com/watch?v=X347D_L_nw4 Bergmann and Sams: pH & pOH Part 2.
Fri, April 17: No HW over the break. We will continue our discussion of the antacid lab results when we come back to school.
Thurs, April 16: Be thinking about your method of testing an antacid in HCl. What is your hypothesis going to be?
Wed, April 15: In your text Chapter 4 pp 128-132 (Acid-Base Reactions). Do the Sample Exercises (green boxes) on pages 130-131 and page 132. Put the answers on a new page in your lab book beyond the space you need to complete the pH lab. Tomorrow we will start neutralization so it is important that you get this work done tonight.
Tues, April 14: Vodcasts to watch and take notes on:
B&S Strong and Weak Acids and Bases, Parts 1 and 2
https://www.youtube.com/watch?v=u5mNk1CEpDg&index=5&list=PLfw2W2kXjtFT6qsaGTRZ1eqf3ofyKizLU
https://www.youtube.com/watch?v=Rp3LuoDNFY0&list=PLfw2W2kXjtFT6qsaGTRZ1eqf3ofyKizLU&index=6
Mon, April 13: Vodcasts to watch and take notes on:
Bergmann and Sams: Introduction to Acid and Base Chemistry Part 1
https://www.youtube.com/watch?v=K_b6b8huAx8&index=1&list=PLfw2W2kXjtFT6qsaGTRZ1eqf3ofyKizLU
Bergmann and Sams: Introduction to Acid and Base Chemistry Part 2
https://www.youtube.com/watch?v=B_RwMvev7ts&list=PLfw2W2kXjtFT6qsaGTRZ1eqf3ofyKizLU&index=2
April 10: Homework-free weekend! We will continue our lab on Monday.
QUIZ on Friday on redox: metal activity series, electrochemical cells, batteries, corrosion, writing half reactions and overall reactions. We will use Thursday to review.
April 8: https://www.youtube.com/watch?v=N8u7eTNL4FE Ontario TV Part 6 Electroplating. Take notes.
April 7: https://www.youtube.com/watch?v=ULeVServXoM Ontario TV Part 5 Corrosion. Watch again and add to your notes. On page 888 of your textbook, do problems 20.79, 20.81, and 20.83 in your lab book.
April 6: https://www.youtube.com/watch?v=Z22_QbuDAkA Ontario TV Part 4 Commercial Electrochemical Cells. Pay attention to animations and equations. Take notes.
April 3: On page 885, in your lab book, answer questions 20.25 and 20.26. Be sure you copy the overall cell reaction into your answer, otherwise the answers will not make sense when you study them later.
April 2: Using Appendix E (p 1117) and your notes from class today and Mr. Andersen's vodcast last night, draw a Magnesium - Lead galvanic cell and calculate the voltage. Your drawing should include ions in solutions, solid electrodes, connection via wires to a voltmeter, direction of electron flow. Label LEO and GER; anode and cathode. Write the two half-reactions below each beaker. Show the math you did to get the voltage.
April 1: https://www.youtube.com/watch?v=Rt7-VrmZuds
Mr. Andersen on electrochemistry. Take notes.
Also, your Google Drive rewrite is due by the end of this week.
March 30: Work on your Metal Activity Series lab rewrite on Google Drive. Be sure to include me as an editor.
March 27: https://www.youtube.com/watch?v=RX6rh-eeflM
Mr.Andersen teaches you about oxidation-reduction reactions (redox). I know I have your lab books so you will need to take notes on something else.
March 26: Lab books will be turned in tomorrow. Be ready to discuss the lab and the problem set.
March 25: Finish your write-up of the Metal Activity Lab we did today. Do the problems at the bottom of the handout.
March 24: http://www.bozemanscience.com/beginners-guide-balancing-equations
Mr.Andersen shows you the basics of balancing equations.
March 23:
(1) Homework in your textbook: page 251 problems 6.71, 6.72, 6.73, 6.74
(2) http://www.bozemanscience.com/ap-chem-005-electron-configuration
Watch, take Cornell notes (or another structured note-taking method).
What you want to pay attention to:
shell-->subshell-->orbital-->pairs of electrons
valence electrons are in the s and p subshells (he doesn't say it but it helps to know that!)
The matrix of orbitals with the arrows running diagonally is known as the Aufbau Principle. It shows the order in which orbitals are filled based on energy. But we can also figure that out by using the Periodic Table.
Finally, the energetics of the valence electrons plus the shielding effect of the inner core electrons explains the pattern of ionization energies (the zig-zag graph). Notice that the mini-dips in the ionization energy graph often indicate where an electron is filling a new orbital, rather than having to share one with another electron.
The boxes with up and down arrows are yet another way to notate how the electrons are filling the orbitals in the subshells. Electrons want their own "seat on the bus" (or as I call them, "loveseats") rather than having to share one. Just like people!
Textbook pages that support this vodcast are 228-242. Look at the images and captions.
March 20: http://www.bozemanscience.com/ap-chem-006-periodicity
Here for an encore appearance: Mr. Anderson and Periodic Trends. This will help you complete a worksheet in class/for HW.
March 19: Quiz tomorrow: bonds, naming, formulas, periodic trends.
March 18:
Work on Lewis dot diagrams, if you need to. Start with individual atoms, then try two ions together (not polyatomic). We will have one more day of review Thursday then quiz Friday.
March 16:
Finish your lab write up for grading tomorrow.
Start reviewing naming, formula writing, polyatomic names, periodic trends for quiz later this week.
March 11, 2015: In your lab book:
Record your observations from today.
Answer the post-lab questions.
March 10, 2015:
(1) Prep your lab book for tomorrow:
Title
Pre-lab answers
Problem statement
Materials: microwell plates, pipets, unknown solutions, white paper
Summary of procedure (provided tomorrow)
Data table (copy in or paste in)
March 9, 2015 - refresh - add to your notes
http://www.bozemanscience.com/naming-compounds-part-1
http://www.bozemanscience.com/naming-compounds-part-2
Mar 6: Work on the Greenbowe Periodicity Lab using the handout. We've done Table IIA. Now do IVA which has you look across a row (period) and record data. Examining this table should suggest a reason why atomic radii get smaller as you go across. Next, read page 6 on the topic of Effective Nuclear Charge. We will start here on Monday. I will post the table we created in class on Google Drive.
Mar 4: Reading in text 296-307. Pay attention to bold terms, what distinguishes ionic from covalent bonds (you've seen vodcasts on these already, I know.) See what new info you can find. Consider using a graphic organizer to do a compare and contrast.
Mar 2: Yikes! Lab books need some help. Please finish the redo of the lab write up as we discussed today.
Feb 27: Read text pages 254-263. This information will help us finish our periodic trend worksheet.
Feb 26: Just make sure you have your periodic trends worksheet with you and your lab book is ready to turn in.
Feb 25: https://www.youtube.com/watch?v=7DjsD7Hcd9U Mr.Andersen (8:56) take notes.
https://www.youtube.com/watch?v=zXYMZxcV18U What is needed to break a chemical bond? Make a chemical bond? The answer only takes 42 seconds!!
Feb 24: Make sure that your lab book notes are up to date: you have your purpose, hypothesis, procedure summary (1-2 sentences)* and your data table at least drawn in. *If you missed the procedure summary we can find a way to work it in as part of the conclusion; don't worry. We will finish data collection tomorrow and start the analysis.
Feb 23: https://www.youtube.com/watch?v=8qh5myTmcRs
Vodcast on Group 2 metals. Take notes.
Over February Break: To help you with the in-class periodic trend activity, ie, watch these; we'll restart the activity in class on the 23rd. (Do I need to remind you to take notes?)
Vodcast #1: To put Vodcast #2 in context (No notes on this one, actually!)
https://www.youtube.com/watch?v=DYW50F42ss8
Vodcast #2: Welcome to the fabulous team of Bergmann & Sams. Feel free to speed through the first two minutes. This is part 1 of 2.
https://www.youtube.com/watch?v=KDTfMBnd_oo (6:00)
Vodcast #3: Bergmann & Sams Part 2 of 2
https://www.youtube.com/watch?v=WmrJrLa6s5s (9:44)
In the event that B&S are not your cup of tea, you can have Mr. Andersen instead:
http://www.bozemanscience.com/ap-chem-006-periodicity (~8:00) Warning: Assumes much prior knowledge.
Feb 12: IN CLASS: Web site to go with your periodic trend activity.
Feb 11: Watch these vodcasts and take notes in your lab book:
(1) Describe what you observe
(2) Explain the phenomenon as best you can.
https://www.youtube.com/watch?v=m55kgyApYrY (3 minutes)
https://www.youtube.com/watch?v=Jq7NSn5rWR8 (1:30)
Brainstorm Questions for today's class
Look at your Periodic Table.
1. What do elements have in common in a column? What do elements have in common in a row?
2. Why do you think "Alkali Metals" got their name? "Alkaline Earth Metals"? "Halogens"?
3. Do you recall any "rules" about which elements like to bond together vs. those that do not like to bond?
4. What distinguishes a metal from a nonmetal?
5. What are the chemical properties of an element?
Feb 10: Study for Quiz on "What's in an atom and how do we know?" (material learned since the beginning of the semester.) Use the practice tests from today - cover/uncover; test yourself.
Feb 6: "Is this all there is?" Find out by going through this delightful online tutorial
http://www.particleadventure.org/eternal-questions.html
Goals for learning (Answers in the Lab Book)
(1) What are the fundamental particles that make up matter?
(2) Describe the properties of these particles.
(3) What holds these particles together?
You may supplement via MinutePhysics on YouTube.
Feb 5:
(1) Complete your comparison table for Nuclear Fusion. Use page 918 in your textbook for guidance.
(2) Read the excerpt from "Surely You're Joking, Mr. Feynman". Bring your comments/reactions tomorrow.
Feb 4: Complete second worksheet, if necessary.
Watch this vodcast on E=mc2 & how it relates to nuclear fission.
https://www.youtube.com/watch?v=FU6y1XIADdg
Feb 3: Complete the worksheets assigned in class today in your lab book.
Jan 30: Read section 21.4 pages 903-905.
Study the Sample Exercise 21.6 on page 904 and try the Practice Exercise below it.
Your reading goals are
(1) What is meant by a "first-order kinetic process"?
(2) Define "half-life."
(3) Using Figure 21.8, what is the mass of the 10-gram Strontium-90 sample after (a) one half-life? (b) two-half-lives? (c) three half lives? (d) four half-lives?
(4) How many years does it take a 10-gram sample of Strontium-90 to get to (roughly) 0.5 grams?
(5) What is the range of half-lives, according to the text?
(6) What factors affect the half-life of an isotope?
(7) What is "radiometric dating?"
(8) Describe how carbon-14 measurements are used to determine the age of an object.
(9) What is the oldest sample that can be dated using carbon-14, and explain why.
(10) What kind of isotope is better suited for dating rocks? Why?
(11) How has radioactive dating informed us about the age of the Earth?
More equation practice: On page 926, try problems 21.27 (a) (b) (c) (d) (e)
Jan 29: Read text pages 892 to the middle of 898. Your reading goals are (1)What are the names of the three radiation types? (2) Describe how a nuclear equation is written (for radioactive decay) (3) Explain the principle behind a balanced nuclear reaction.
Disney movie in case you want a second look: https://www.youtube.com/watch?v=Gi-ItrJISQE
Jan 28: Watch minutes 30-43 of same vodcast. Make use of her notes.
Jan 26: Vodcast - Renee McCormick http://vimeo.com/14217141
This is lengthy. You are not expected to get all the way through it in one sitting. Just watch FROM 20:41 TO 30:00. We'll be jumping around.)
Notes are already made - linked at the bottom of this page (02 Atoms Molecules Ions.pdf)
Jan 23: Chemistry text reading pages 36-46, which corresponds to sections 2.1, 2.2, 2.3. You are reading to answer the following questions:
p 37:
1. What are the four postulates (statements) that form Dalton's Atomic Theory of Matter?
2. How did Dalton define "atoms"?
p 38-39: One of the landmark discoveries that the atom was actually composed of even smaller matter was made by J.J. Thomson. What part of the atom made up his "cathode rays"? (We'll learn how the machine works in class.)
p 40-41: The second important discovery, by Robert Millikan, involved what kind of device? What detail about the electron did his experiment reveal?
p 41: Look at Figure 2.8 at the bottom of this page, and read the description. Describe in your own words what each ray (alpha, beta, gamma) is doing in response to the electrical plates. Explain why two of these rays bend.
p 42: Rutherford went on to do an experiment that provided the third important discovery about the parts of the atom. Look at Figure 2.10 at the bottom of the page and read the caption. Describe what is happening in the illustration.
p 43: Figure 2.11 shows Rutherford's model (idea) of how the atom was structured based upon his gold foil experiment. Describe what his atoms look like. Then, look at Figure 2.9 on page 42. Describe Thomson's atomic model and explain how it compares to Rutherford's atomic model.
p 43: Refresh your memory on the names of the three subatomic particles, their charge, and their mass. (Keep mass simple: it's 1 amu for protons and neutrons; the electron has about 1/2,000 the mass of the others so we generally consider it massless.)
pp 44-45: Refresh your memory on atomic number, mass number, and isotope. Be able to "decode" representations like this 146C.
Jan 22: Study for the safety quiz on Friday. Have a parent sign your safety contract. Must be done before you can do lab work.
Jan 21: Oops! Forgot to assign HW. Count on some tomorrow.
If you need help with the Analysis Section concepts, go to the vodcasts
http://www.bozemanscience.com/ap-chemistry/
http://www.bozemanscience.com/chemistry/
Bergmann and Sams are extensive so start with the ones I linked within the HW assignments below.
BBC website on how elements are used in industry