Look over the comments I posted on your google doc for the lab research project, and make the necessary changes tonight.  I'll look them over again tomorrow morning. Thanks

First draft of the introduction for your research report is due this morning through google docs

Choose one of the topics you identified today a a possible lab-based research project and do an online search for three legitimate sources of background on the topic.  Write a brief summary of your topic based on your online search.  Make a bibliography including web addresses for your three sources

Here are the past five AP FRQ tests with solutions.  They are already released, but here they are in one easy click

For homework, go over the multiple choice I handed out yesterday.  You don't need to time yourself on this one

Review our work on titration and your textbook chapter 15 to complete questions (51,52,55).  Show your work for #55 (note that it is very much like our class practice)

For homework,

Use your understanding of buffers and the Henderson-Hasselbalch equation to complete questions (41,42,44) on page 741.  In these cases, you need the Ka values, and you are basically working backwards when compared to your preparation of the buffer today.  This morning you were figuring out the pH; for these questions you know the pH and are figuring out the concentrations.

Review our notes and work on buffers to complete questions (37-40) on page 741.  You can turn in this assignment along with yesterday's homework I haven't collected yet.

For homework, complete questions (21-25) page 740.  This requires you to use notes from the previous week on pH of salt solutions (23b and 24b), reactions that show how each half of a buffer system reacts with and neutralizes either hydronium or hydroxide ion, as well as today's work on pH of buffer solutions.

As a follow-up to our work on Monday and Tuesday, complete questions (105a, 106a, 107-110) on page 676.  These look at the quantitative aspects of salt hydrolysis (see your notes on calculating pH of a salt solution)

For HW,

Were heading into the home stretch of AP Chemistry topics.  For homework, read and summarize sections 15.1 through 15.3 on Buffers and resistance to changes in pH of a solution.  Also, include all of the sample exercises within the section.

FRQ Assessment today (weak acid equilibrium, weak base equilibrium, low solubility salt equilibrium)

For homework, study for the assessment using your notes and working on your FRQs for weak acid, weak base and low solubility salt equilibria. FRQs are not due this Friday.

Refer to our notes today on solubility of salts and Ksp as well as the text sections you read yesterday to complete questions (75-80) on page 743 of your textbook

Read and summarize sections 15.6-15.7 in your textbook which looks at the equilibria of low solubility salts.  Include the sample exercises (15.12-15.18)

As an introduction to weak base equilibria and salts, read and summarize sections 14.6 and 14.8 including the sample exercises 14.12-14.14 and 14.18-14.21.

 

Also, continue working on your Aqueous Equilibrium FRQs I and II

Review the concept of percent dissociation of acids from the text (pages 641-644) and our notes to complete questions (63-67) on page 675 of your textbook.  Many of the Ka values you need are found in Table 14.2 (page 628)

Review our notes from today (weak acid equilibria and ICE boxes) and section 14.5 from your textbook to complete questions (55-60) page 675. 

As we look at the dissociation of acids (and bases) in solution, what we find is that strong acids and bases dissociate nearly 100%; however, weak acids and bases dissociate a very small amount.  Their dissociation reactions are reversible.  For homework tonight, carefully and completely read section 14.5 in your textbook (equilibrium of weak acids).  Summarize the section including the sample exercises 14.9 through 14.11.

We are moving into our last AP Chemistry unit, which is the study of aqueous equilibrium.  This begins with a look at those substance that can change the pH of a solution (acids and bases).  For homework, read and summarize sections 14.1 through 14.4 in your textbook (including sample exercises 14.1 through 14.7 (the question and how it was solved).

Assessment Electrochemistry (FRQs due today)

For HW, work on your FRQs.  Assessment on Electrochemistry is Friday (FRQs due then)

For HW, work on your FRQs.  You know have a good number of them

For HW complete the attached file exercising galvanic cells and reaction stoichiometry

Work on your AP FRQ Electrochemistry practice sheets (I-IV) over the weekend

Use your notes from today to attempt questions (77,79,81,83,87) on page 834 of your textbook that ask you to carryout calculations based on using current over a period of time to electrolyze a substance.  The answers are found at the back of the book for these, but show your work.

We have not been together enough this week for you to be prepared for quantitative homework problems on electrolysis.  So for homework tonight, review the topics we have covered to date and complete the active learning questions (2,4,6,8,10) on page 829-830 in your textbook.

As a further introduction to electrolysis, read and summarize sections 17.7 and 17.8 of your textbook

Included here are links to three Khan Academy videos on Electrochemistry: review of the Nernst equation and "Q" affect on cell voltage, introduction to electrolytic cells by comparing them to galvanic cells, and an introduction to quantitative aspects of electrolysis.  Watch and summarize (with examples) each of the videos.

 

 

 

Review our notes and FRQ practice for the past two days to complete questions (51,55,57,58,59).  Note that most of these questions are based on the Nernst Equation.  We are more interested in the conceptual aspects of this area of electrochemistrty, not the calculations. So for each question, instead of using the Nernst Equation, Calculate the standard voltage for that cell and then use either Lechatlier's Principle or a "Q" calculation to determine the direction of shift and whether the voltage should increase or decrease from standard voltage.

Review our topics from the past few days to complete questions (31,33,,37,41,45) from pages 831-832 of your textbook

Review our work from the past two days and sections 17.1 - 17.2 from your textbook to complete questions 25-29 on page 831

Tonight's homework is a review of oxidation-reduction concepts, some of which we covered today in class and lab.  Complete questions (13,14,15,17,22) on page 830.  Note that in question 22, "corroding" is oxidation of that metal.

We are moving into electrochemistry (electrical energy generated from chemical reactions and vice versa).  For homework, read and summarize sections 17.1-17.4 of your textbook.  You will see a connection between electrical voltage of a reaction, free energy and the equilibrium constant.

Study for Assessment on Thermodynamics

All the FRQs are due today

Homework tonight is to work on your FRQ practice (we have 7 FRQ pages with questions on front and back). 

Also continue to use your AP Study Guide Big Idea #5 on Thermodynamics

In an effort to reinforce the conceptual and quantitative relationship between delta G and Keq, watch and summarize the Khan Academy video (link below).

 

Read/review section 16.7 and 16.8 from your textbook on Free Energy, Pressure, and Equilibrium, and complete questions (57,59,61,63,65).  Answers are in the back of text, but you must show your work/reasoning.

Review Section 6.3 in your textbook on Hess' Law and complete questions (59-63) on page 269.  Show your work (how you manipulated the reactions and how they added up to the overall as well as how the energy added up).

Review Chapter 16 in your textbook and your class notes to complete questions (33, 45, 47, 49, 51) on pages 784-785.  Answers are in the back of the text.  You must show your work.

For HW complete the front side of the AP Thermo FRQ page (2 questions).  Also, read Big Idea #5 from AP study guide (Thermodynamics).  Look over the multiple choice and FRQ questions from this section of the AP study guide.  Remember, you bought this book, now really start using it.  AP exam is less than 3 months away

Review section 6.2 on Enthalpy and Calorimetry including the sample exercises.  Complete questions (49-53) on page 268 of your textbook.  As always, show your work

Assessment today: gas phase equilibria

FRQs are due today

As another form of reinforcing quantitative equilibrium, watch and summarize (with examples) the attached Khan Academy video on ICE boxes. 

 

Review chapter 13, your class notes and practice FRQs to complete questions (39,41,43,45,47) on page 616 of your textbook

For HW, read and summarize section 13.7 on Le Chatlier's Principle.  Be sure to read through the sample exercises 13.13,13.14, and 13.15.  Then complete questions (57, 59, 61) on page 617.  The answers are in the back of the text, but you must justify your response (explain why it shifts one way or the other).

Review your notes, FRQ practice and textbook chapter 13 to complete questions (65, 67, 69, 71) from page 618 of your textbook.  Note that the answers to all of these questions are available to you at the back of the textbook; the important thing here is that you must show your work.

Review chapter 13 and our work from class to complete questions (33-38) from page 616 of our textbook

Read and summarize Section 13.5 in your textbook (especially the section on Reaction Quotient and sample exercise 13.7). Then complete questions 17, 22, 24 (note that it is a 2.00 liter flask.  You must calculate the concentrations), and question 26.

We are moving into our study of reversible reactions and chemical equilibrium.  For HW:

For HW complete the ASA Experiment #30.  Both the ASA and prelab (which you should have already completed) are due Monday

For HW

For HW:

For HW review our work from today on rate laws from initial rate data to complete questions (25-30) pages 567-568.

As we just introduced using initial rate data to determine orders of reactants and the rate law for a reaction, watch and take notes on the attached Khan Academy video on the topic when we have two or more reactants

 

One outcome of today's lab will be to use the two reactions and Hess' law to determine the enthalpy for  another reaction.  So for HW tonight, review section 6.3 in your textbook on Hess' Law and read over the sample exercises 6.7 and 6.8 thoroughly.  Then complete questions 59-63 on page 269 (you must show your work manipulating the reactions and showing how things cancel, etc.)

For HW:

For HW tonight:

For HW review section 12.1 in your textbook and complete questions (19-22) on page 567

Create a data table for time, [NO2], ln [NO2], and 1/[NO2],  Then graph ln [NO2] vs time on one graph and 1/[NO2] vs time on a second graph