Category Archives: Chemistry 11H

Ch4 Test

  1.  Hand in ch4 Notes and review worksheet.
  2. Today, students wrote the ch4 test.
  3. Tuesday, Jan 21 – Goal Day – students who have already completed their test corrections and have spoken to me can come at 12:30pm to write their retest (or at the time you already scheduled with me).  Any assignments since the beginning of Term 2 are due by Goal Day.
  4. Thurs. Jan 23 – volunteers to mentor the gr8s with their science fair projects can meet at the N.Cafeteria from 8:30-10ish and from 10:30 to 11:45ish.
  5. Tues. Jan.28 – the class will be judging science fair projects.  Bring a calculator to help total the scores!  Think about who you would like to pair up with AND/OR if you are confident to judge projects on your own, then you can let me know.

Sci Fair Prep and Review of Ch4

  1. Today, students reviewed controlled experiments, variables and controls, the marking rubric, and do’s and don’ts to help prepare to judge science fair projects.
  2. Volunteer to help mentor the gr8s and 9Es on Thurs. Jan 23 between 8:30-10ish and/or 10:15-11:45ish!
  3. Finish ch4 notes and review worksheet.  Hand in next class.  See answer key for ch4 review worksheet here:  Ch4 Review Worksheet Answers
  4. Ch4 test next class (Monday).  Outline:  (sorry I changed it a bit block 5! fewer mc and more written)about 20 multiple choice questions and about 5 written questions.  The written questions will focus on molarity calculations and precipitation reactions.
  5.  Warm up!  Molarity PreTest Worksheet  This is extra, extra practice on molarity calcualtions if you have completed all other practice.
  6. Hand in Lab 20C.

Lab 20C Titrations

  1.  Do:  Lab 20C.  Work in groups of 4.  One pair starts with part 1, the other with part 2.  If you run out of time, you can get the data from your other group members.
  2. Questions for the lab:  1.  What is the molarity of the HCl solution?   2.  What is the percent purity of the vinegar solution?
  3. Finish reading ch4 and taking notes.
  4. Do:  Ch4 review worksheet.

Our schedule for the next 2 weeks:

  1. Next class:  We will be reviewing the scientific method and how to make a controlled experiment.  We will also have time for reviewing chapter 4 and asking questions.
  2. Ch4 test on Monday, Jan 20.  Notes and review worksheets due.
  3. Tues Jan 21 – Goal Day!  Any assignments and tests for the first half of Term 2 are due by Goal Day.
  4. Thurs Jan 23 – be a mentor to the gr8s and 9s!  In the morning, the gr8s and 9s will be peer evaluating science fair projects.  It would be great to have some senior science students (gr10/11/12) to mentor them.  You would listen to their presentations and give them some feedback.  Students have the weekend to make any changes to improve their project.
  5. Tues. Jan 28 – we will be judging science fair projects during class.
  6. Thurs. Jan 30 – start chapter 5!

Finish Lab 6B

  1.  I will be able to calculate the molarity, moles, and volume of an aqueous solution.
  2. Finis Lab 6B by measuring the mass of chalk made (and test it out by drawing with it!).  Answer the following 3 questions:  1.  What is the limiting reactant?  Prove it using calculations.  2.  What is the theoretical yield of CaCO3?  3.  What is the percent yield of CaCO3?   No discussion or conclusion necessary (since you already did a similar lab with Lab 4B)
  3. Read section 4.5 and do #51, 55, and 67 for extra practice.
  4. Block 5 – Friday, Jan 10 meet in Room 8 (just for today).  Block 7 meets in Rm113 as usual.

Lab 6B Making Chalk!

  1.  Recap of what we have covered and where we are going….
  2. Let’s get you moving and awake!  Do:  Lab 6B (day 1) Making Chalk.  See copy here:  Lab 6B.  We will dry your precipitate and finish the measurements and calculations next class.
  3. In the meantime, read ch4 and take notes!  I estimate we will finish the chapter in the next 2 weeks.

Review of Ch3

  1.  Warm Up!
  2. Finish Ch3 review worksheet.  Remember to mark your work (see answer key here:  Ch3 Review Worksheet Answers) and show your corrections.
  3. Next class:  hand in ch3 notes and review worksheet.
  4. Next class:  Ch3 test.  It will be all written (no mc questions).  Major topics:  Mole conversions, empirical and molecular formulas, % composition, limiting reactants and reactants in excess, % yield.

Limiting Reactants Re-explained

  1.  I will be able to determine the limiting reactant, reactant in excess, and percent yield.
  2. Sample question (see classmates for notes)
  3. Finish Lab 4B and hand in.
  4. Finish ch3 review worksheet for next class so we can go over any questions you have.
  5. Reminder:  TNT Club available for extra tutoring support Mon-Thurs after school until 4pm.
  6. Answers to ch3 review worksheet here: Ch3 Review Worksheet Answers   Check your work and do your corrections!

Finish Lab 4B and More Mole Ratios!

  1.  Finish collecting data for Lab 4B.
  2. Questions:  1.  How many grams and moles of Fe was used?  2.  How many grams and moles of CuCl2 was used?  3.  How many grams and moles of Cu was formed?  4.  Determine which reactant is the limiting reactant,  Fe or CuCl2?  5.  What is the theoretical yield of Cu?  6.  What is the percent yield of Cu?  (Note:  Let’s use Fe(III))
  3. Possible Sources of Error – what could have caused the yield not to be 100%?
  4. Conclusion

5.  Go over “Mole Ratio” worksheet.  How can you apply what you have learned to Lab 4B?

6.  Continue with ch3 review worksheet.  You will have time on Friday to finish it and ask more questions.

Lab 4B (Day 1)

  1.  Prelab check!
  2. Do:  Lab 4B Steps 1-11 (Day 1).  You will work in groups of 4 to try to be more efficient.  Label the beaker with the copper in it and wrap and label your 2 nails.  These will dry for next class.  You will finish your measurements and calculations next class.
  3. Do:  “Mole Ratios”  worksheet for Wed. class.
  4. Read section 3.6 to help you understand more about Mole Ratios.
  5. Do:  start chapter 3 worksheet.  Chapter 3 test scheduled for Tues. Dec. 17.