Category Archives: Chemistry 12

Snow Day- what to do in the meantime

After you have had fun in the snow and have warmed up, you can make sure you have completed reading section 1-5 of Unit III and done some practice questions from each section.

For extra practice, the worksheet (posted with answer key on last day’s blog) is very good and will help you review the major topics from each section.

Friday, Jan 17 – Unit III test on sections 1-5.  There will be about 30 multiple choice questions and 2 written questions.  Since we were supposed to do some review/training for judging science fair projects today, I will omit the 2 written questions and use the last 15-20 minutes of class to do the judges training.

The test will have a large proportion based on precipitation reactions, but will also include understanding of vocabulary terms and molarity calculations.


Goal Day on Tuesday, Jan 21   12:30-1:45pm Keq retests, make sure you have completed your test corrections and have spoken to me

Sci Fair mentoring Thurs. Jan 23 8:30-10:15am;  10:30-11:45am – to help give feedback to the students presenting their projects.  This will also give you a preview of some of the projects.

Monday, Jan 27 – Science Fair judging – you will evaluate the projects using a rubric and give feedback to the students

Review of Unit III sec1-5

  1.  Hand in labs 16D and 16E if you haven’t already.
  2. Review of Unit III sections 1-5.  Any questions?  Make sure you have read and done practice questions from the workbook.  Extra practice worksheet and answer key posted on last day’s blog.
  3. Preparation to judge science fair projects- review of controlled experiments, look at the marking rubric, do’s and don’ts of assessing the projects
  4. Volunteers to mentor on Thurs. Jan 23 in the morning 8:30-10ish and 10:30ish to 11:45ish.
  5. Reminder:  Goal Day on Tuesday, Jan 21.  Retests for Keq from 12:30-1:45pm.  Make sure you have done your test corretions and talked to me to get extra practice.

Finish Lab 16E

  1.  Finish Lab 16E and submit what you think the identity of your unknowns are.
  2. Make sure you are up to date on your readings and practice questions for Unit III.
  3. Finish any test corrections for the Keq test.  If you scored less than 86% and want to write a retes, talk to me so I can check your test corrections and give you some extra practice.  The retest will be on Goal Day, Jan 21, from 12:30-1:45pm.
  4. Review worksheet (do this after you have finished practice questions from the workbook):  Ch12Unit3Review-1 do #1-25.  See answer key here:  Ch12Unit3ReviewKEY (1)
  5. Unit III sections 1-5 Test will be on Friday, Jan 17.
  6. Next class, we will start Ksp and will do some review of the scientific method to prepare you to judges our gr8 and gr9 science fair projects.  Volunteers who are able to help on the morning of Thurs Jan 23 to mentor the students can sign up with me!

Lab 16E

  1.  Lab 16E – Selective Precipitation.  Identify the unknown cation in part 1 and unknown anion in part 2.
  2. Do:  corrections for Keq test.  If you need/want extra help, come during Flex time, after school Mon/Tues., or go to Connect/TNT for tutoring after school.
  3. Goal Day is on Tuesday, Jan 23.  Any assignments, tests, or retest should be completed for the first half of Term 2 by that date.
  4. Heads up!  Unit III sections 1-5 Qu-est on Friday, Jan 17.

Selective Precipitation

  1.  Recap of what we have covered so far and where we are heading…
  2. I will be able to selectively precipitate ions from a solution.
  3. Finish Lab 16D equations and hand in.
  4. Read section III.5 and do #30 and 32.
  5. Prep Lab 16E for next class.  See copy here:  Lab 16E

Lab 16D

  1.  Do:  Lab 16D.  Get your prelab stamp!  Check whether your predictions are correct.
  2. Do:  For each DIFFERENT precipitate, write a formula, complete ionic, and net ionic equation. (i.e.  If 3 different combinations of solution made CaCO3 (s),  you choose one of the three combinations to write the 3 equations.)
  3. If you were absent for this lab, you should do the predictions FIRST, then get data from someone who did the lab and check to see if your predictions are correct.  Write the equations.

Keq Test today!

  1.  Today, students wrote the Keq test (part 2 of Unit II).
  2. If you want to do a retest for the Le Chatelier’s Principle test, you should be completing it before Christmas break (preferably by tomorrow!  Book yourself into Flex time!)