Monthly Archives: December 2019

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.


  1.  Go over section 5.1 worksheets.  We marked part of it in class and students handed in the rest.
  2. Quick review:  I will be able to explain how light refracts as it passes from one medium to another.
  3. Activity:  Refraction.  Draw and label your diagram and answer the questions on the back side.
  4. HW:  Science fair – collect data, start a draft of your report (the parts you can prepare so far), buy/recycle a display board (I buy mine from Michaels the craft store and use the discount coupon (often 40% off) to save money.  Some students have found that Dollar Stores also carry display boards –just make sure it is big enough to hold all your information, graphs, and visuals.)

Law of Reflection

  1.  Quick Review of Reflection
  2. Activity:  The Law of Reflection (if you are absent today, please book Flex time on Thursday to do the activity).  Independent variable:  the angle of incidence;  Dependent variable: the angle of reflection.  What is the relationship between the angle of reflection and angle of incidence?
  3. Finish section 3.1 worksheet pages (will be marked next class)
  4. HW:  work on science fair project – any questions before Christmas break??

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!

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!)

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.