To close out the week, we embarked on a study of dilution, a technique used by scientists to alter the concentration of a liquid.  For our lesson, students worked with their lab groups to prepare serial dilutions of a solution colored with one or more food dyes.  They measured the peak absorbance of their assigned colors at each dilution and then graphed their results, followed by analysis of the graph as outlined in the Lesson 87 section of the work packet for Lessons 85-87.

With so many activities last week keeping students out of class, only a few people were able to complete the Dilution Lab.  We will complete the lab on Monday, with students watching a brief video explaining how a spectrophotometer works, and then they will receive a set of teacher-generated absorbance data for the diluted color samples.  The data is contained in the Dilution Lab Slide Deck. Students will complete the Lesson 87 questions and then turn the packet in for credit.

Notes from class (June 12 Review):



Tomorrow we will engage in our final lab of the year!


  • Read Lesson 87 in the textbook and complete the exercises assigned in the work packet.  Login via hs.saplinglearning.com and enter your username and password:
    • Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number).  Remember to include the dash between s and #.
    • Password: S-####### (the S must be capitalized)
  • Please ask questions about anything from Lesson 87 you do not yet fully understand.

Opportunities For Help Outside of Class:

  1. Mr. Swart’s office hours: Mondays, Tuesdays, and Thursdays after school until at least 3:00 (later with advanced notice)
  2. Use the vast number of resources available on this website – check each lesson!
  3. Email Mr. Swart for help if staying after school is not possible
  4. Form a study group with other students  to review concepts from class
  5. Attend MASH after school (M/T/Th in Library)
  6. Attend Math Lab after school (T/Th in Room 124)

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