Monthly Archives: October 2017

Halloween fun and more!

  1.  Some Halloween fun:  Flame tests – how do you make the colors used in fireworks?  (also ties in to Quantum/Bohr model and the excitation of electrons which gives off light)
  2. Demo:  Le Chatelier’s Principle – using universal indicator, some acid, and base, you can make all the colors of the rainbow!
  3. I will be able to use enthalpy and entropy to predict whether are reaction will not occur, will go to completion, or will reach equilibrium.  We finished off the notes from last class:  Equilibrium

Halloween fun and more!

  1.  Some Halloween fun:  Flame tests – how do you make the colors used in fireworks?  (also ties in to Quantum/Bohr model and the excitation of electrons which gives off light)
  2. Demo:  Le Chatelier’s Principle – using universal indicator, some acid, and base, you can make all the colors of the rainbow!
  3. Go over Equilibrium #2 Worksheet
  4. Begin prep for the Rainbow Lab
  5. Extra practice:  Le Chatelier’s Principle worksheet

Le Chatelier’s Principle

  1. Warm Up!  Equilibrium #1 Worksheet – predicting whether a reaction will not happen, go to completion, or reach equilibrium.  See copy here:  Equilibrium Worksheets
  2. I will be able to use collision theory and reaction rates to explain Le Chatelier’s Principle and how the reaction responds to changes.
  3. See block 6 notes here:  Le Chatelier s Principle
  4. Do:  Equilibrium #2 worksheet (included in the Equilibrium Worksheets in #1) – do questions #1 and 4.  Include in your answers:  what is happening to the collision frequency?  what is happening to the forward and/or reverse rates?  Which way will the reaction shift (to make reactants or to make products)?

Ch2 Review

  1.  Hand in the Chromatography Lab.
  2. Go over the ch2 review worksheet and do corrections.  What do you need to review more?  See answers here:  Ch2 Review Worksheet Answers
  3. Study!!
  4. Test outline:  major topics covered are:  history of the atom, parts of the atom, elements and the periodic table, writing and naming compounds (ionic, covalent, hydrates, acids).  Format of the test:  about 20 mc questions and the written section will have 3 parts:  1) parts of the atom, 2) write the formula of the compound and 3) write the name of the compound.

Library Class #1

  1.  Today, students gathered in the library to learn about academic honesty, how to cite sources (Works Cited), how to use EasyBib, and how to evaluate whether a website is reputable or not (CRAAP acronym – see handout the librarian gave).
  2. Start thinking of ideas for your project!

Intro to Unit 2 – Equilibrium

  1.  Oops!  There was a photocopying error for your tests and the Unit I test is postponed until Friday.
  2. Today, we started Unit II on Equilibrium.
  3. Demo:  large spoon vs. small spoon transferring water into each other’s container – when will they reach equilibrium?
  4. I will be able to describe equilibrium systems and predict whether a reaction will be spontaneous, reach equilibrium, or will not react at all.  See notes here:  Equilibrium
  5. Other demos:  traffic light (changes from yellow to red to green and back) and the purple bottle (changes from grey to purple and back)

Intro to Ch15 Equilibrium

  1.  Go over ch14 test and do the test analysis (hand in to me) and test corrections (then put it into your folder in the filing cabinet)
  2. Demo:  big spoon vs small spoon transferring water – when will they reach equilibrium?
  3. I will be able to describe equilibrium systems.  See notes here:  Equilibrium
  4. See handout of learning outcomes for ch15:  ch15 Chemical Equilibrium Learning Outcomes Learning Log 2016
  5. Do:  Read sections 15.1 AND 15.7 on Le Chatelier’s Principle.
  6. Other demos:  traffic light (changes from yellow to red to green and back when you shake it)  and the purple bottle (changes from grey to purple and back when you shake it)

Quiz, Lab, and Review

  1.  Quiz on Writing and Naming Compounds
  2. Chromatography lab write-up.  In groups (of up to 6), write a formal lab.  Include:

Calculations:  Calculate the Rf values for each colour.

Questions:

1.  Which were pure colours?  Which were mixtures of colours?

2.  Why is it impossible to have an Rf value over 1.00?

Discussion:  What did you learn?

Possible sources of Error: (non-human errors;  non equipment related errors)

Conclusion

3.  Do:  chapter 2 review WS for next class.

4.  Ch2 Test on Monday, Oct. 30