Category Archives: Chemistry 12

Keq Calculations – Day 2

  1.  Warm Up!  Question #2 from Jan 1999 and #2 from June 1999 free response section.
  2. Finish the questions in your workbook!  Show your work.  If your answers do not match those in the answer key and you can’t figure out why, come see me.
  3. Do:  Term 1 Self Reflection and Goal Setting for Term 2
  4. Next class:  In class assignment

Keq Calculations

  1. Make sure you have handed in all your assignments for Term 1!  They are past due.
  2. I will be able to use the equilibrium constant, Keq, to calculate the initial or equilibrium amounts of reactants or products.  See handout here:  Equilibrium Calculations sample exercises  and class notes here:  Keq
  3. Read sections 6 and 7.  Do #31-35 for section 6, and #47-65 for section 7.  You can also finish the 2 sample questions on your worksheet that we did not have time to finish.

Keq – How/Why is it Constant?

  1.  Hand in Rainbow Lab
  2. I will be able to explain how/why the equilibrium constant is constant.
  3. In class worksheet “Equilibrium”.  See copy here:  31 Equilibrium-S
  4. Read section 6 and 7 in your workbook and choose 2-3 questions from each section to do for practice.
  5. Check your progress report to make sure it is correct and that you have completed all work for term 1.  Please note that I have not marked/updated marks if you wrote a retest on Goal Day.  When I have completed marking them, I will update your term marks.

Le Chatelier’s Principle Test

  1.  Today, students wrote the Le Chatelier’s Principle Test.
  2. Reminder:  Goal Day tomorrow.  If you want to retest Unit 1, you should have already completed your test corrections, identified where you need practice, completed extra practice to give you confidence and to test your understanding, and then talked to me.  Retests will be from 12:30-1:30pm.  If you cannot make it then, you can come earlier.
  3. Reminder:  If you have any assessments you want to count for term 1, you need to submit them by the end of this week (Thursday)

Rainbow Lab Day 2

  1.  Warm Up!  Try #7-10 from April 1999 provincial exam.
  2. Finish gathering data for the Rainbow Lab.  In your groups, finish the formal lab write up.  Use the Analysis checklist in your handout to make sure you include the different points in your explanations.
  3. Next class:  Test on Sections 1-5 on Le Chatelier’s Principle

Extra practice:

  1. Equilibrium Practice Test

    Equilibrium Quiz answers to Approaching Equilibrium

    Equilibrium Quiz answers to Le Chateliers Principle

Rainbow Lab

  1.   In groups of up to 4 people, plan what chemicals you would add to the five possible equilibrium systems in order to shift the equilibrium to make the  colors of the rainbow.
  2. Do the lab!
  3. Document what you observed. (can take pics)
  4. Analyse the lab (google docs are great!)
  5. make sure each person is contributing to the write up and analysis of the lab.  If they aren’t, they need to write their own lab report.