Chemistry Assignments 2015-2016
Our final exam is scheduled for Thursday, Jan 14 after lunch. Your FINAL draft is due by Friday 3 PM. I will read whatever is there at that time. I know you will do your best!
Tuesday, Jan 12: By the end of class today you have had a chance to try out your demonstration (unless we have made other arrangements). It is up to you to remind me of any details or special arrangements. Otherwise you are working on your second draft today in Google Drive.
Monday, Jan 11: First draft of entire paper in Google Drive. (Yes, you can actually do this having not practiced your demo yet. YouTube is a beautiful thing. Many have gone before you. Make sure you include in your Bibliography the sources you use for your methods, results, analysis and/or conclusions. Your paper must be in your own words.)
Friday, Jan 8: Mini-deadline today is to identify the nanoscopic (atomic level)--macroscopic (what you observe at the human eye and ear level)--symbolic (equations, drawings) of your demonstration. These will flow from the chemistry you identified yesterday.
Thursday, Jan 7: Mini-deadline today is to identify what chemistry is involved in your demonstration (type of reaction, types of bonding, thermochemistry, kinetics, acid-base, oxidation-reduction, IMFs, organic chemistry...
Wednesday, Jan 6: (1) Determine what your essential question is for your demonstration. (2) Start your Google Drive document with Purpose and Methods. You will document your progress every day for credit.
Monday, Jan 4: Textbook page 471, problems 1-6 (conceptual).
Wednesday, Dec 23: Complete chocolate polymorph experiment. OK if you haven't finished the analysis: turn in your lab books. I will be looking for vodcast notes and intermolecular forces lab (ball and stick).
Tuesday, Dec 22: Chocolate polymorph experiment in process. Be sure you have read through the lab.
Monday, Dec 21: Vodcast https://www.youtube.com/watch?v=-QqTwJzi7Wo Mr.Andersen explains intermolecular forces, which explain a number of chemical properties, including melting point.
Friday, Dec 18: No HW
To be clear: Antacid investigation writeup needs to be in tomorrow, Thurs, Dec 17. Excellent lab book version or typed on Hapara (Google Drive).
Wed, Dec 16: You are starting to write up your lab report on the efficacy of an antacid. You will have time in class to work on it a little, but we will be starting the ornament lab tomorrow as well.
Friday Dec 11: If you complete the lab write up, turn in your lab book. Otherwise it will be due Monday.
Thursday, Dec 10: Lab in progress; no new HW. Lab books due tomorrow.
Tuesday, Dec 8: QUIZ tomorrow.
Posted under files at the bottom of this page is most of the Q&A we did today. In some cases I streamlined the answers. (an .odt file is an open software format that your word processing software will recognize.)
Monday, Dec 7: Each of you are assigned a concept for which you need to locate several test questions - fro your textbook or other online sources. Bring tomorrow. We will use for review. Quiz Wednesday then on to buffers
Assignments for tomorrow:
Characteristics of acids and bases: EB & JC
Definition & characteristics of strong vs. weak acids, strong vs. weak bases - TB & CS
The meaning of pH and pOH - CF & JG
Calculating pH and pOH - GH
Writing and balancing a neutralization reaction - ASE & CR/SC & ED
Identifying and predicting conjugate acid-base pairs - AC & KF/ JPL & CalT
Purpose of and steps in a titration experiment - AW & HH
Calculating molarity of an unknown acid or base using titration data - RL & CTie..
Endpoint vs. equivalence point - KR & LV
Friday Dec 4: Lab Reports Due Today!
I am linking some review of acid-base concepts. Alternatively, you can watch the videos I have already posted since the beginning of the unit.
https://www.youtube.com/watch?v=KrFB7GrAcpY (5 minutes)
https://www.youtube.com/watch?v=sRL7Hfyir64 (watch from minute 17:30-28:00 - this is a review for an entire chemistry course; you just want to see the acid-base review section)
Prepare for our last concept for this unit: buffers (Mr. Andersen) - take notes
https://www.youtube.com/watch?v=rIvEvwViJGk
Thursday Dec 3: Textbook practice problems - page 713, problems 16.46 (a) through (d) and 16.48 (a) through (d).
Dec 2: Bergmann and Sams explain how to calculate the molarity of the unknown strong acid solution that you titrated with a strong base. You may start the first vodcast at about minute 5:00. From 0:00-5:00, Mr. Sams is demonstrating the procedure using an indicator rather than a pH meter. Feel free to watch. The second vodcast continues the calculation then demonstrates other kinds of titration problems.
https://www.youtube.com/watch?v=Kn4KG_GHDFg
https://www.youtube.com/watch?v=5ITJ5ry1tbI
Dec 1: In your lab book, be sure you have the purpose, procedure and data collected thus far. Write down questions you have at this point re: the procedure, titration in general.
Nov 30: Read pages 150-154 in your textbook to learn the concepts of titration and neutralization reactions.
Read through your lab handout so that you are familiar with the purpose and procedure you are to follow.
Happy Thanksgiving!
Fri, Nov 20:
(1) Practice identifying conjugate acid-base pairs
Textbook pages pp 670-675. Problems 16.17-16.22 (pages 710-711).
More explanation: https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/v/conjugate-acids-and-bases (Sal Khan)
(2)Practice neutralization reactions
https://www.youtube.com/watch?v=HdmCagtasYg (Mr. Andersen)
Textbook pages: pp 132-135. Problems pgs 157-158 - 4.37-4.40
Thurs, Nov 19: HW is to finish a worksheet that you will get in class, to practice calculating pH or pOH from concentration and vice versa. Also, do Problems 16.39 and 16.40 on page 676 of your text. (If you find 16.39 easy and you get all the answers correct, you don't need to do 16.40.)
Wed, Nov 18: We will finish the lab (analysis and conclusion) in class tomorrow. The photo of the chart on the chalkboard is linked at the bottom of this page as file IMG_0734.
Your HW tonight:
https://www.youtube.com/watch?v=u5mNk1CEpDg B&S on strong and weak bases' behaviors, Part 1/2
Two words of caution: You are going to hear something very disturbing right off the bat. All I can say is the guys are right. Enjoy your relationships, remembering that nothing is forever. They also only name two strong bases. If you watch their AP Chemistry version, they will list the others that I gave you today in class. You should know all 6 bases.
https://www.youtube.com/watch?v=Rp3LuoDNFY0 B&S on strong and weak bases' behaviors, Part 2/2
Tues, Nov 17:
For your experiment today I have linked a table of indicators under Files so that you can interpret the colors. (indicator-20table.png)
HOMEWORK
https://www.youtube.com/watch?v=J2Qp9obE6iA B&S on pH and pOH part 1
https://www.youtube.com/watch?v=X347D_L_nw4 B&S on pH and pOH part 2
Your goal is to understand how to calculate a pH from a concentration and vice versa.
Mon, Nov 16:
https://www.youtube.com/watch?v=K_b6b8huAx8 Introduction to Acids and Bases Part 1/2 (Bergmann & Sams)
https://www.youtube.com/watch?v=B_RwMvev7ts Introduction to Acids and Bases Part 2/2 (Bergmann & Sams)
Take notes in your lab book, preferably Cornell style.
ALSO: In your textbook: pages 128 (where the section on Acids and Bases begins) to the middle of page 132. Be sure to work the examples and practice problems along the way. This bit is conceptual. Be prepared to demonstrate learning tomorrow:
(1) How is an acid and a base defined?
(2) What is meant by strong and weak?
(3) Examples of acids and bases, strong and weak.
Fri, Nov 13: Quiz Monday. You will be asked to
(a) draw and label an electrochemical cell (voltaic)
(b) calculate a voltage potential using the Standard Reduction Potentials table
(c) use the metal activity series chart to predict whether a reaction will take place
(d) distinguish between a voltaic and an electrolytic cell (the first is spontaneous; the second requires an input of electricity)
(e) recognize different types of redox reactions, e.g., single replacement (like lithium in water), voltaic cell, battery, rust, corrosion, electroplating..)
http://www.superteachertools.us/jeopardyx/jeopardy-review-game.php?gamefile=45853#.VkXjYWRY6ko electrochemistry jeopardy - optional review activity
https://www.ted.com/talks/louie_schwartzberg_nature_beauty_gratitude#t-435924 Here is that lovely TED talk showing the time lapse photography of flowers; gratitude.
Thurs, Nov 12: http://www.chem1.com/acad/webtext/elchem/ec7.html - another helpful site on corrosion.
Finish your review packet for HW. Practice test tomorrow. NOTE: Some of the questions you won't have the info to answer. It's OK. Skip over them.
Tues, Nov 10: https://www.youtube.com/watch?v=ULeVServXoM Vodcast on Corrosion, yet another form of redox reaction! Cornell notes.
Mon, Nov 9: See Friday's entry. **Read the Hindenberg article that was attached to your lab procedure. Be ready to discuss tomorrow.
Fri, Nov 6: Make sure that your lab book has the Title, Purpose, Pre-lab questions answered, and Procedure completed so you are ready to start the lab first thing on Monday. I expect that you will be able to do the lab and complete the analysis/post-lab questions and conclusion on the same day.
Lab Books due Monday by the end of the day. No late books accepted. If you are absent Monday you will have Tuesday to complete the lab and turn in the lab book.
Contents: Work since Small Scale Voltaics:
Goals and responses to them 10/30-11/9; in-class notes; HW (if it's on separate paper, please affix in your lab book, just for the check-off): Oct 30 HW; Nov 3 Electrochemical Cell Worksheet answers; Nov 4: Compare and contrast table of batteries; Nov 5: completion of the "fill-in-the-blank" vodcast notes on redox; Nov 6 & Nov 9: Micro-Hindenberg lab.
Thurs, Nov 5: links to help you with new worksheet: https://www.youtube.com/watch?v=e6Xxz-VBE6s
https://www.youtube.com/watch?v=0oSqPDD2rMA
https://www.youtube.com/watch?v=01k-YA2jDLU Real footage of Hindenberg disaster. Why did it burn?
Wed, Nov 4: https://www.youtube.com/watch?v=7ai4DmHWrWw This is the vodcast we will watch in class.
Tonight: Read the section in Chapter 20 of your textbook about commercial electrochemical cells, aka batteries.
Read chapter 20 pages 870-874. Compare and contrast the lead-acid,alkaline, Ni-Cd, Li, Hydrogen cell batteries. Be prepared to show your answers at the beginning of class tomorrow.
Tues, Nov 3 (sorry I didn't post on time): You are finishing the worksheet of electrochemical cells, calculating the voltage produced.
Mon, Nov 2: I had intended to assign some more redox practice problems, but instead, you should complete Friday's HW or correct any mistakes on it. We'll get back at it tomorrow.
Fri, Oct 30 HW: Practice identifying the oxidation state of each atom, writing half-reactions, and labeling what oxidized (aka the reducing agent) and what reduced (aka the oxidizing agent). If you need a refresher, re-watch the vodcasts assigned on October 22 again.
UPCOMING: This Friday: (1) the final submissions of the potato chip lab, and (2) another stoichiometry quiz.
Wed and Thurs: Keep studying/reviewing your notes on oxidation-reduction as we take a pause to finish up some old business.
TUES OCT 27:
With your handout of the standard reduction potentials (SRP) of the five metals:
(1) List each metal pair you tested and write the SRP underneath.
(2) Determine which SRP is more positive: that determines which metal reduced (GER). Note: the SRP is NOT the same as the charge on the metal!
(3) Do this subtraction: GER SRP minus the LEO SRP. The answer is the actual voltage difference you should get when connecting them to a voltmeter (aka TRUTH).
(4) Calculate the error between your value and "truth" (ie, do an error analysis.)
DUE tomorrow.
MON OCT 26:
(1) Rest of the lab books due today. No late books will be graded.
(2) Get with your potato chip lab team and make sure that Procedure, Results, & Analysis conform to one of the examples given. Make sure that teammates who need to show more contribution do these updates. DUE FRIDAY. No exceptions.
(3) You don't have to proceed with your lab work at home b/c lab books are in.
FRI OCT 23: (1) Lab Books due today. I will accept Monday at the latest. (2) Read through your lab so you are ready to start Monday. This vodcast will help you understand the idea of an electrochemical cell.
https://www.youtube.com/watch?v=Rt7-VrmZuds (Mr.Andersen - Electrochemistry - 8:43)
THURS OCT 22: Complete the first two parts of your note-taking guide using the two links below (Title: "Oxidation-Reduction Notes from Vodcasts Assigned During the Week of Jan 2-4") (obviously first created for a previous course). Your textbook will continue to be very helpful if you are uncertain about what's going on.
https://www.youtube.com/watch?v=_fNNQfGGYr4 (Introduction to Oxidation States)
https://www.youtube.com/watch?v=yp60-oVxrT4 (Redox Reactions)
WED, OCT 21: https://www.youtube.com/watch?v=4-LA9BxQsdE - Oxidation-Reduction Reaction Demonstrations - you are listening for "transfer of electrons". Who oxidizes? Who reduces? What do those terms mean?
Your textbook reading tonight: Chapter 4 pages 135-142.
Mon, OCT 19:
(1) Finish your limiting reactant lab and turn in. OK to use your completed handout.
(2) Complete the practice quiz tonight so you can bring questions tomorrow. We will go over the answers.
(3) Review in your text pages 107-109 (Concepts) and redo problem numbers 17, 23, 37, 53 and 65.
(4) Plan on quiz Wednesday.
Thurs, OCT 15: Read through your lab directions, including the analysis questions. Reading will help you see the direction you are going with your calculations and reasoning. I will take you through a "mock calculation" so you can see how you will get answers using your data. Ideally the hands-on part of the lab is finished tomorrow, and you are well on your way to finishing the write-up.
What questions do you still have with calculating a limiting reactant? Or the concept?
Wed, OCT 14: Those of you who are secure with the concept and calculating of limiting reactants have no new HW tonight. There are plenty of activities provided or listed below for others to keep working and getting more confident with these skills.
Fri, OCT 9: Because next week is quite short, I will be asking you to do more work outside of class. I won't see you again until Wednesday.
(1) More grams-->mols and mols-->grams practice (handout) - it is scanned and can be found at the bottom of this page in the Files section (look for DOC101315 in the name).
(2) Read about Limiting Reactants (LR) - the concept and the chemistry (pages 102-107). Follow through the examples.
(3) https://phet.colorado.edu/sims/html/reactants-products-and-leftovers/latest/reactants-products-and-leftovers_en.html To get a better idea of LR, go to this website that has activities for you to do. It's fun. Trust me. How will I know you did it? Bring me proof.
(4) Read and understand the directions to the LR lab we will start on Wednesday. I may quiz you on the procedure to be sure you understand what you are doing and why. This is a safety issue.
Thurs, OCT 8: Textbook pages 113-114: problems 3.58, 3.60, 3.61, 3.62; 3.63, 3.64. Don't worry about the parts of questions that ask you to deal with density or gas pressure.
Wed, OCT 7: Today is your day to
(1) Get back with your "potato chip lab" group and write a final, very-much-improved version of your lab report. Recall that the main areas of need were the Results, Analysis and Conclusion sections. Copies of my comments will be provided. They are not exhaustive, meaning that you may spot more things to fix. Go for it. This is the version that will be worth lots of points and will replace the grade out of 6 points you previously got.
(2) Finish the homework assignments from last night and two nights ago - ONLY after task (1) is completed.
Tues, OCT 6: Introduction to Quantitative Information from Balanced Equations (your textbook pages 98-102). This section deals with how much product(s) you will get from a certain amount of reactants.
Vodcast https://www.youtube.com/watch?v=4cZLjcNvJbU - The teacher is using the same reaction in your text page 99 (bottom half). He is using a different starting amount but the approach is the same.
SUBMIT your Empirical Formula report, either on Google Drive or via lab book, unless I expressly spoke to your group otherwise.
MON, OCT 5: More practice with calculating empirical formulae: p 112 probs 3.43-3.50.
10/4/2015: Gradebook updated. Missing assignments have been converted to zeroes.
FRI OCT 2: Text reading pp 52-53 the section entitled "Molecular and Empirical Formulas"; pp 95-96 the section entitled "Empirical Formulas from Analyses." The latter section gives you an idea of how you will analyze your data.
Let's say your Mg mass was 2.0 g. Your product masses out to 3.2 g. You know that your product contains Mg and O.
Step 1: Use subtraction to determine how many grams of the finished product is oxygen (O).
3.2g – 2.0 g = 1.2 g O
Step 2: Use mole conversion to find a ratio mols Mg: mols O.
g Mg * 1 mol/24 g = mol Mg → 2.0 g * 1 mol/24 g = 0.083 mol Mg
g O * 1 mol/16 g = mol O → 1.2 g * 1 mol/16 g = 0.075 mol O
Step 3: Divide your mol values--> mols Mg / mols O = ratio of these two elements in the formula.
0.083/0.075 = 1.10. This is almost a 1:1 ratio. You would conclude that there is one Mg for every one O in magnesium oxide.
LAB BOOKS DUE MONDAY: I expect you will have your data collected, calculated your empirical formula, and drawn a conclusion! :)
THURS OCT 1: Make sure that your lab book is up to date with Purpose, Methods, Results, Analysis, Conclusion for the Pre-Lab. AND that you at least have the Purpose, Prediction, Methods and Data Table shell for the Magnesium lab.
Starting October 1, the most recent assignment will appear at the TOP of the page.
----------------------------------------------------------------------------------------------------------------------------------------
August 27: Get course description handout signed by a parent. Bring to school tomorrow.
August 28:
(1) Your first vodcast assignment: Mr. Andersen: Sig figs review
Expectation: Use Cornell notetaking style to record main ideas on the left side of the page, and supporting details on the right hand. You are listening/watching for big ideas, not every single word the teacher says.
I will check you notes on Monday for a grade.
(2) Study for a lab safety quiz Monday: fill-in-the-blank format with a word bank!
Aug 31: Watch and take notes on these two vodcasts. Take Cornell notes - use his slide headings for the right hand side; details on the left.
https://www.youtube.com/watch?v=jEoQ6TNLJl8 "Matter" - You are listening for what matter is made of; what is the difference between atom, element, molecule?
https://www.youtube.com/watch?v=Pft2CASl0M0 "The Mole" (Mr.Andersen) - just the first 2:40. You are listening for the definition and why this value is useful.
Sep1: http://www.sciencegeek.net/Chemistry/taters/Unit0Sigfigs.htm
20 online problems to practice - write your answers in your lab book.
Sep 2: https://www.youtube.com/watch?v=IiLrVBA_bjs - Mr. Bergmann and Mr. Sams introduce you to the concept of solutions, which we will need for our first lab. Take Cornell notes in your lab book.
Sep3: No new HW. Be sure your lab books include your HW and class notes. The lab books will be turned in tomorrow. Close-toed shoes tomorrow.
Sep 4: On your molarity practice problems handout, calculate the molar mass of the first six chemicals (problems 1-6). You should do it right on the worksheet.
Potassium carbonate is K2CO3
Lithium bromide is LiBr
Iron (II) chloride is FeCl2
Ammonium sulfate (NH4)2SO4
Calcium phosphate is Ca3(PO4)2
Copper (II) fluoride is CuF2
Note: all of the numbers should be LOWER CASE (subscripts)
Sep 9: (1) Complete problems 1-5 on your molarity worksheet. Show your work. (2) In your lab book, you should be able to answer the first goal, "Do all compounds react with other compounds?" Include evidence from our experiment and notes I wrote on the Writescreen (projected).
Sep 10: Complete problems 6-10 on your molarity worksheet. If you didn't get the chemical formulae, here they are. (Remember that the numbers are subscripts)
Copper (II) fluoride = CuF2
Lithium fluoride = LiF
Aluminum acetate = Al(H2C3O2)3
Lead (II) oxide = PbO
Manganese (IV) oxide = MnO2
Be ready to record your experimental procedure and start your experiment tomorrow!
Sep 11: LAB BOOKS DUE TODAY!
More practice with molar mass and molarity over the weekend (handout)
http://ths.sps.lane.edu/chemweb/unit6/problems/molarity/ - wait on problems 5 and 6.
Sep 14: Vodcast to help you understand how to complete the last two problems: writing and balancing equations and what "the big numbers in front" mean: Mr. Andersen "A beginner's guide to balancing equations." Take Cornell notes in your lab book or notebook.
https://www.youtube.com/watch?v=_B735turDoM
Sep 15:
(1) Linked below [DOC091515-...pdf] are scanned pages showing solutions to #2-10 of the molarity problems, along with a description of the strategies I used. If you feel at all unsure about how to do these problems, check it out.
(2) I'm sorry that Monday's vodcast did not work for many of you. I will substitute "Dr. Dunn, live and in person" on Thursday.
(3) Well done today with your experimental questions and discussion.
Sep 16: (1) Bring questions about molarity calculations, otherwise I assume you understand what you are doing and I can quiz you anytime. (2) We will analyze your data tomorrow.
Sep 17: (1) Set up the analysis of your data using the notes we made in class today. They are scanned and attached (DOC091715-09172015184401.pdf) in the files section. Tomorrow you should be able to finish a first draft of your lab report.
(2) Molarity problem of the day (to keep you "in shape") How many grams of potassium chloride (KCl) are needed to prepare 0.750 L of a 1.50 M solution of KCl in water?
Be the first to bring me the correct answer and a bag of potato chips is YOURS!
Sep 18: LAB BOOKS DUE TODAY (unless you are absent, then it is due Monday).
Do the 12 molarity questions on the new worksheet. In case you didn't pick one up, here it is DOC091815-09182015190724.pdf.
Use my posted notes (Sept 15) on how to solve these if you need the assist, b/c I have your lab books. The link is the second file below. DOC091515-09152015191813.pdf
Sep 21: Vodcast - take Cornell notes. http://www.bozemanscience.com/naming-compounds-part-1
In this vodcast you will learn that there are two naming systems depending upon the type of bonding that the atoms make. We have been working with ionic compounds, like NaCl and AgNO3. Right now the goal is to figure out the name, not the formula. That will come next.
Sep 22: More naming practice. Handout will be given. Also scanned in and posted below.
Formal group lab report due end of day Wednesday DOC092215-09222015192953.pdf
Sep 23: Complete handout to name molecular compounds. Watch Mr. Andersen's vodcast again if you need it.
Thurs, Sep 24: http://www.bozemanscience.com/naming-compounds-part-2 From the name, write the formula.
Also, get your textbook signout sheet signed. Then you will get the textbook.
Fri, Sep 25: See scanned attachments - support materials to help you with balancing equations.
Page 1 is a step-by-step of how to balance a chemical reaction. Pages 2-3 is the M&M activity. Page 4 is some more balancing
practice, but won't be assigned until Monday, Sep 28.
HW: You are reading pages 80-83. Do practice problems at the bottom of page 83, then problems on p 108 3.1; page 109 3.9 through 3.12. See scanned attachments if you don't have a text yet
Mon, Sep 28: return to the vodcast assignment of Sep 14 (A beginner's guide to balancing equations). Rewatch this one to see if you pick up more understanding the second time around.
Tues, Sep 29: Preparing and heating a crucible. Take notes.
https://www.youtube.com/watch?v=zlML6plk5_A
Read through the pre-lab procedure. Prep your lab book with the Title, Lab Partner(s), Date, Purpose, Methods and Data Table.
IMG_0631.jpg is the link to the "Conclusion" paragraph you saw in class today.
Wed, Sep 30: More practice with balancing equations:
http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm
Write out the whole equation in your lab book with the coefficients. It's OK that it will be sandwiched between the pre-lab and the gravimetric analysis lab.