Chemistry 223

Items Due During Week 7:

Section L1: Due in Recitation on Monday, May 11 at 1:10 PM in AC 2501:

• The "Determination of K_sp, ΔG°, ΔH° and ΔS° for Ca(OH)₂" lab
• Problem Set #5
• We will take Seminar Self Quiz #5 and Quiz #5
• Bring a printed copy of the "Qualitative Analysis of Group I Cations" Lab to recitation. No open toed shoes, shorts or mid-riff exposing shirts this week, and bring your safety glasses!

Section L2: Due in Recitation on Wednesday, May 13 at 1:10 PM in AC 2501:

• The "Determination of K_sp, ΔG°, ΔH° and ΔS° for Ca(OH)₂" lab
• Problem Set #5
• We will take Seminar Self Quiz #5 and Quiz #5
• Bring a printed copy of the "Qualitative Analysis of Group I Cations" Lab to recitation. No open toed shoes, shorts or mid-riff exposing shirts this week, and bring your safety glasses!

All Sections:

• Start studying the material in Chapter 16.
• Class Presentations will be happening during Week 9 (about two weeks).
• Note that May 15 is the last day to drop or change individual grade status at Mt. Hood Community College (information)

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This week we continue our discussion of 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. This is the chapter on batteries which are incredibly important to us... it's an exciting chapter! If you have any questions, do not hesitate to ask me, ok?

Here's what is happening in week 7 of CH 223:

• Explore the material in Chapter 16 There are several tools to help you learn the material.... they include:
  • Read Chapter 16 in the textbook
  • Watch the Complete Lectures for Chapter 16 (found here: Part I, Part II)
  • Lecture videos for Chapter 16 will be found on YouTube and as a Podcast.
  • Chapter Guide Five (online learning materials for Chapter 16) might be helpful
  • "Mini video lectures" can be found in the Screencasts page for CH 223 under Chapter 16
  • The Concept Guide for Chapter 16 and other Chapter 16 handouts might prove useful.
• Due: Problem Set #5 which covers problems from Chapter 16.
  • Use this link to get the Spring 2026 version of problem set #5, and use this link to find the recitation video which you can use to self correct your work before turning in to the instructor.
  • Practice Problem Set #5 might be of help while completing problem set #5; answers are included at the end of the document.
• This Week: Seminar Self Quiz #5 and the (actual) Quiz #5
  • All quizzes (Seminar Self Quizzes and actual Quizzes, as well as midterm exams and finals) are closed book / no notes allowed. You cannot use a cell phone or computer; you can have a dedicated calculator and a periodic table (which I will provide) only.
  • First, take Seminar Self Quiz #5. You will have 20-30 minutes to complete the quiz, and afterwards we will self correct the Quiz as a class before turning it in. If you are late, or do not attend recitation for any reason, your score will be a zero on the Seminar Self Quiz.
  • After taking the Seminar Self Quiz, you will take the actual Quiz #5. Quiz #5 will take about 30 minutes and consist of several 'show your work' questions. Turn in the quiz when done (I will pass back any corrected work I have for you at this time.)
  • Sample Quiz 5 (answers at the end) might be useful to help you prepare and study.
• Due: The "Determination of K_sp, ΔG°, ΔH° and ΔS° for Ca(OH)₂" lab
  • Bring the completed lab with you to recitation.
• Start: The "Qualitative Analysis of Group I Cations" (QA I) Lab.
  • Bring a printed copy of the "Qualitative Analysis of Group I Cations" Lab with you to recitation.
  • Bring safety glasses; also, do not wear shorts or have mid-riff showing shirts, and no open-toed shoes!
  • The Lab Introduction Video to this lab might be helpful.

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Here's a preview of what's going to be happening during Week #8:

• Midterm Exam II
  • This midterm exam covers problem sets #4 and #5 (essentially Chapters 15 and 16.
  • The midterm will have 12 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. You will have 90 minutes to complete the midterm exam.
  • The midterm exam will be closed book; no notes are allowed. You will be able to use your calculator and a periodic table (which I will provide.)
  • 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 can be found can be found here.

• Midterm Exam II details by section of CH 222:
  • Section L1 will take the midterm on Monday, May 18 at 1:10 PM in AC 2501.
  • Section L2 will take the midterm on Wednesday, May 20 at 1:10 PM in AC 2501.

• To Study and Prepare for Midterm Exam II:
  • Watch the Complete Lecture of an Exam Review for the first Midterm Exam here: Midterm Exam Review
  • Lecture videos for the Exam Review for the second Midterm Exam will be available on YouTube and as a Podcast.
  • A sample exam (with answers) 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 5 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!
  • The Exam Prep II worksheet will be due at the time of your midterm exam II.
• Due: The "Qualitative Analysis of Group I Cations" Lab.
• Bring the completed lab with you to recitation
• Start: The Qualitative Analysis of Group III Cations Lab.
  • Bring a printed copy of the "Qualitative Analysis of Group III Cations" Lab to recitation. No open toed shoes, shorts or mid-riff exposing shirts this week, and bring your safety glasses!
  • Here is a video which shows what the lab will be like, offer hints, etc.