Hope you all had a nice holiday. I have a couple of things for you to do for the last week of the break.
The first is to read and take notes from the reading (Chapters 7,8,9,10,11). These chapters cover atomic structure, bonding, forces of attraction between molecules and attraction of particles to solvents (solutions).
The second, I will post later. It will be practice FRQs based on the topics from chapters 7-11). When we come back from break on the 9th, I would like to move right into reaction kinetics (chapter 12).
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For the final, be sure to study each of your Gas Behavior and Thermodynamics FRQs.
Best of Luck on the Final :)
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Complete the attached document on chemical change and bond energies
As we approach the fall final exam for AP Chemistry, we need to have a solid understanding of energy change during physical and chemical processes. For homework, please read Chapter 6 and Chapter 10 (only sections 10.1-10.2 and 10.8-10.9). For both chapters, take written notes for the reading and answer the "Active Learning Questions" found at the end of the chapter: Chapter 6 (1-8 page 265-266) and Chapter 10 (1-11 page 474-475).
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Complete the attached worksheet that includes FRQ style gas behavior problems (some qualitative and some quantitative)
Assessment - Double Replacement Reactions and Stoichiometry (Precipitation, Acid-Base Neutralization) NO COLORIMETRIC ANALYSIS
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Early lab start 7:15 am Experiment #7 from your lab manual (molar mass of a volatile liquid). ASA due and Pre-lab ready.
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Read and take notes on sections 5.4 and 5.5 from your textbook
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Finish the Solution Stoichiometry Worksheet and the FRQ from class today that relates to gravimetric analysis
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Enrichment opportunity this morning (7:05 am). Bring your sheet titled: AP Chemistry Enrichment Double Replacement Reactions on one side and Solution Stoichiometry on the other side.
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Early lab start today (7:15 am) Experiment #6 (handout, not in your lab manual) ASA due and pre-lab ready.
Also, the double replacement reactions are due today (that's 1a-d and 2a-d)
Try and complete the double replacement reactions worksheet (complete balanced equations and net ionic equations questions 1 and 2) by Thursday. Remember, do not dissociate weak acids or weak bases.
We've addressed combustion, synthesis and decomposition reactions which are oxidation-reduction reactions, and currently we've been looking at single replacement reactions (also oxidation-reduction). Read section 4.9 (which should be review) and section 4.10 (which is new) and take notes from the reading (especially a sample exercise for balancing in acidic solution). Answer questions 72 and 74 from page 174 to the best of your ability.
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As we did in class on Thursday (creating questions for oxidation of a halide by a halogen), use the Table of Reduction Potentials (attached here) to create 6 questions and then work them out. Three of them should be oxidation of a metal by a metal ion solution and the other three should be oxidation of a metal by the hydrogen ion of an acid (for this assignment just use strong acids like hydrochloric or nitric). Use your class handout of these type of reactions or reference as needed,
Here are some practice equations (single replacement). Fore each one, write a balanced equation and balanced net ionic equation, and identify what category of reaction it is (oxidation of metal by metal ion, oxidation of metal by hydrogen of acid, or oxidation of a halide by a halogen)
barium metal reacts with hydrochloric acid solution (strong acid)
manganese (II) nitrate solution reacts with aluminum metal
chlorine gas reacts with lithium iodide solution
potassium metal reacts with calcium sulfate solution
nitrous acid (weak acid) reacts with zinc metal
fluorine gas reacts with sodium chloride solution
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Assessment - "Formula for a Compound from Experimental Data." topics included determining a formula from
synthesis reaction- like expt 4a
dehydration of a hydrated salt- like expt 13
successive decomposition/reaction of a compound to element form - like expt 5 ASA and 4 ASA
combustion analysis - like notes from Friday
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study for the assessment tomorrow - Determining a chemical formula through reaction. Refer to Experiment 4, 4a, 5 and 13 as well as your notes and practice problems.
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Enrichment 7:05 am today. (determination of chemical formula through reaction like we have done in lab and on ASAs the past two weeks)
If you planned on taking a parallel assessment for the last assessment, you need to be here at 7:05 am today.
Leaving enough space in your lab notebook to finish Expt #4a, complete the ASA only for Experiment #13 (page 99-104 of your lab manual). We are going to carry out just the water of hydration part of Experiment #13 today (not an early start though).
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Complete the calculations for Experiment 4a (in addition to calculating the % magnesium in the oxide, determine the formula as you did in 1c and 1d of the ASA). This goes in your lab notebook.
Also, note that certain uncontrolled errors will have an affect on your mole quantities (and therefore your formula). Analyze how each of these uncontrolled errors would affect your final mole quantities of magnesium and oxygen and write your responses out on a separate piece of piece of paper (not the lab notebook):
not enough time to oxidize all the magnesium so there is still magnesium metal present
not all the magnesium nitride byproduct is converted to magnesium oxide
some of the product escaped in smoke
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Read sections 2-3 through 2-5 and 3.1 through 3.4 and take notes on the reading
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Early start Experiment 4a this morning (7:15 am)
ASA Experiments 4 and 4a due and pre-lab (introduction, materials and methods, and results data tables) ready.
Experiment 4 is in your lab manual (ASA only). Go back to yesterdays homework for the attachment for Experiment 4a (this is the lab we are carrying out today.
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Experiment #1 due today. This includes the introduction, materials and methods, and results page, along with your discussion/conclusion. For the discussion/conclusion in this experiment you should comment on the accuracy and precision as we have learned to do in class (for both parts of the lab), and identify greatest source of inherent error (controlled error) and describe one source of uncontrolled error and how that would affect your reported density (too large, too small). Again, do these for both parts of the lab.
We are going to do an experiment very similar to Experiment 4 in your lab manual on Tuesday (early lab start 7:15 that day). So read over Experiment 4 and complete just the ASA. It will be due on Tuesday. Also due Tuesday will be the ASA for the actual lab we are doing. We will call the lab Experiment 4a. (its attached here; however, the page sequence is reversed. Start reading on page 4 then finish with page 1 which is the ASA) and pre-lab write-up (Introduction, materials and methods, results data tables). You do not need to print the attachment. I will make copies that you can place in your lab manual on Monday.
Bring your lab manual and lab notebook on Monday so we can look over the ASA's before Tuesday.
Read section 2.2 from the text on Fundamental Laws (conservation of mass, definite proportions, multiple proportions). Take notes from the reading, especially sample exercise 2.1, and complete questions 6, 25, 26, 30 from page 69-70.
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Assessment - Error Analysis
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Enrichment opportunity 7:05 am (error analysis)
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From your lab manual, read experiment 2 and 3, both on Resolution of Matter into Pure Substances.
Leave an empty page in your lab notebook for conclusion/discussion Experiment #1. Then on the pages that follow, complete the ASA for Experiment 2 followed by the ASA or Experiment 3. No need to write intro, procedure, results yet.
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Read section 1.9 in the textbook and write a brief description for each of the separation techniques described
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Early Start 7:15 am Experiment #1 from your lab manual (Do not write in the lab manual. All labs are written in the lab notebook you purchased)
Have your Advanced Study Assignment (ASA) completed, and Introduction, Procedure (abbreviated), and results data tables written as well.
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Download and review the Lab Report Format, Safety Instructions and Syllabus for AP Chem (on the right side of this page under files). Sign and return the signature pages to me.