Chemistry 223

CH 223 Announcements

May 15, 2025

Items Due During Week 8:

Section 01: Due in Recitation on Monday, May 19
• The "Determination of K_sp, ΔG°, ΔH° and ΔS° for Ca(OH)₂ (in class)" lab
• Problem Set #5
• We will take Quiz #5 after we discuss the problem set. Quiz #5 will be an in-class quiz (and not a take home quiz); bring your calculator and an optional page of notes. Quiz #5 will be over Chapter 16 only.
• Bring a printed copy of the "Qualitative Analysis of Group I Cations (in class)" Lab to recitation. No open toed shoes, shorts or mid-riff exposing shirts this week, and bring your safety glasses!
• Here is a list of what is happening in section 01 for the remainder of CH 223. There are several changes for Memorial Day.... let me know if you have any questions!

Section H1: Due in Recitation on Wednesday, May 21
• The "Determination of K_sp, ΔG°, ΔH° and ΔS° for Ca(OH)₂ (in class)" lab
• Problem Set #5
• We will take Quiz #5 after we discuss the problem set. Quiz #5 will be an in-class quiz (and not a take home quiz); bring your calculator and an optional page of notes. Quiz #5 will be over Chapter 16 only.
• Bring a printed copy of the "Qualitative Analysis of Group I Cations (in class)" Lab to recitation. No open toed shoes, shorts or mid-riff exposing shirts this week, and bring your safety glasses!
• Here is a list of what is happening in section H1 for the remainder of CH 223... let me know if you have any questions!

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This week we continue our discussion of thermodynamics by exploring Gibbs Free Energy and its relation to enthalpy and entropy. We will also look at electrochemistry, and first we will learn how to balance redox reactions before utilizing electrochemical cells (and electromotive force) to create compounds and predict reaction favorability.

Special note: This is the last lecture-heavy section of Chemistry 223, so hang in there, we are getting very close to the end of the term (and summer!) If you have any questions, do not hesitate to ask me, ok?

Here's what is happening in week 8 of CH 223:

• Explore the material in Chapter 16 and Chapter 17 There are several tools to help you learn the material.... they include:
  • Read Chapter 16 and Chapter 17 in the textbook
  • Watch the Complete Lectures for Chapter 16 (found here: Part I, Part II) and Chapter 17 (found here: Part I, Part II)
  • Lecture videos for Chapter 16 and Chapter 17 will be found on YouTube and as a Podcast soon.
  • Chapter Guide Five (online learning materials for Chapter 16 and Chapter 17) might be helpful
  • "Mini video lectures" can be found in the Screencasts page for CH 223 under Chapter 16 and Chapter 17.
  • The Concept Guide for Chapter 16, the Concept Guide for Chapter 17 and other Chapter 16 and Chapter 17 handouts might prove useful.
• Due: Problem Set #5 which covers problems from Chapter 16 and Chapter 17.
  • Use this link to get the Spring 2025 version of problem set #5.
  • Practice Problem Set #5 might be of help while completing problem set #5; answers are included at the end of the document.
• This Week: Quiz #5
  • Section 01 and Section H1 will take the quiz in class during recitation in AC 2501 (it will not be a take home quiz.)
  • Section W1 will receive a link to the quiz via email Wednesday evening. The quiz should be emailed to the instructor.
• Due: The Determination of K_sp, ΔG°, ΔH° and ΔS° for Ca(OH)₂ (in class)" Lab
  • Section 01 and Section H1: The "Determination of K_sp, ΔG°, ΔH° and ΔS° for Ca(OH)₂ (in class)" Lab
• Start This Week's Lab:
  • Section 01 and Section H1: Qualitative Analysis of Group I Cations" (in class) Lab (bring a printed copy to lab; also bring safety glasses, and no open-toed shoes or shorts)

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Here's a preview of what's going to be happening during Week #9:

• Midterm Exam II
  • This midterm exam covers problem sets #4 and #5 (essentially Chapters 15, 16 and 17.)
  • The midterm will have 20 multiple choice questions and four short answer questions. You will not need a scantron to complete the exam, but you will need to mark your answers clearly on the exam itself.
  • The first and last pages of the exam deserve some comment. The first page of the midterm will include an integrity statement that you will be required to sign. Signing the integrity statement implies that you have not received (and will not be giving) any information on the midterm exam to others that might imply cheating; a failure to sign the integrity statement grants an automatic score of zero, so make sure the first thing you do is to sign the statement. The last page of the midterm exam will be a scoring page which will be filled out by the instructor when the exam has been graded; you do not need to complete anything on this page. An example of the integrity statement and grading sheet for Section 01 and Section H1.

• Section 01: Midterm I
  • The due dates for Section 01 are a bit different due to Memorial Day (Monday, May 26)... so let me know if you have any questions about the schedule, etc.
  • Section 01 will take the midterm during recitation on Monday, June 2 at 1:10 PM in AC 2501.
  • Bring your calculator! Cell phones and tablets are not allowed while taking exams.
  • You will have access to a periodic table and scratch paper.
  • One (double sided) single page (8.5 x 11 inches) of notes is allowed on this exam (staple it to the back of the midterm at the end of the exam.)
  • The midterm will last from 1:10 PM until 3 PM. We WILL have a lab after the midterm (the "Qualitative Analysis of Group III Cations (in class)" Lab which is due at the end of lab.)

• Section H1: Midterm I
  • Section H1 will take the midterm during recitation on Wednesday, May 28 at 1:10 PM.
  • Bring your calculator! Cell phones and tablets are not allowed while taking exams.
  • You will have access to a periodic table and scratch paper.
  • One (double sided) single page (8.5 x 11 inches) of notes is allowed on this exam (staple it to the back of the midterm at the end of the exam.)
  • The midterm will last from 1:10 PM until 3 PM. We will NOT have a lab after the midterm, and you will be done about 3 PM on May 28. The following week (June 4) we will meet in AC 2507 at 1:10 PM for lab (to complete the "Qualitative Analysis of Group III Cations (in class)" Lab which is due at the end of lab.)

• To Study and Prepare for Midterm Exam II:
  • Watch the Complete Lecture of an Exam Review for the second Midterm Exam here: Midterm Exam Review
  • Lecture videos for the Exam Review for the first Midterm Exam will be found on YouTube and as a Podcast.
  • A sample exam is available on the Chemistry 223 website under Quizzes and Exams. You can also view the Chapter Guide written for Exam II.

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Also happening during Week 9 in CH 223:

• Due: The Exam Prep II worksheet
  • An Exam Prep is a handout designed to help you get ready for the midterm exam.
  • I will not be able to help you with the midterm exam, but I can help you with the Exam Prep!
  • Section 01: The Exam Prep II worksheet is due on Wednesday, May 28 at 9 AM in AC 1303 (note the unusual due date! You MUST attend lecture on this date!)
  • Section H1: The Exam Prep II worksheet is due on Wednesday, May 28 at 1:10 PM in AC 2501.
• Due for Section 01 and Section H1: The Qualitative Analysis of Group I Cations" (in class) Lab
  • Section 01: The Qualitative Analysis of Group I Cations" (in class) Lab is due on Wednesday, May 28 at 9 AM in AC 1303 (note the unusual due date! You MUST attend lecture on this date!)
  • Section H1: The Qualitative Analysis of Group I Cations" (in class) Lab is due on Wednesday, May 28 at 1:10 PM in AC 2501.
• We will not be completing a quiz or problem set this week.

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