Tis the Season for Sweet-Tasting Chemistry!

Week 13 Resources/ Assets
Updated November 29, 2018
Please make sure you READ everything on this page or you will miss important details. I will archive past weeks Announcements pages for a limited time only under the Trimester 1 and 2 tabs, if you need to go back to a particular weeks information for any reason.

Week 12 in Review

This past Tuesday, we got through quite a bit of Chapter 8 - Chemical Reactions.  Initially with a molecular modeling kit, we reacted one oxygen gas molecule (O2) with two hydrogen gas molecule (H2), to fashion two water molecules (H2O).  We then reacted methane (CH4) with two oxygen molecules to produce one molecule of carbon dioxide (CO2) and two molecules of water (H2O).

You should have seen from these "reactions" that the same number and types of atoms that are part of the reactants, are also part of the products; in other words, matter is neither created or destroyed in any chemical reaction.

Recollect the five major categories of chemical reactions:
1. Combination (synthesis) reactions
2. Decomposition Reactions
3. Single-Replacement Reactions
4. Double-Replacement Reactions
5. Combustion Reactions
In the interest of time, I will need all of you to watch the screencast linked right before next Tuesday, covering Section 8.2 from your textbook, since I will not take any more class time to discuss this particular section (but you will be responsible for it on your next exam). I realize the screencast is 25 minutes long, there is not enough class time for me to get through this particular section from your book. You may also benefit greatly by watching the Tyler Dewitt video, Major Type of Chemical Reactions.

Hopefully after Tuesday's class, you are comfortable with balancing chemical equations. If you are still struggling with this concept, take the time to watch the two Tyler Dewitt videos below: (1) Introduction to Balancing Chemical Equations, and (2) Balancing Chemical Equations Practice Problems.
​
Upcoming Week 13
On Tuesday, following the making of fudge, and performing Lab 8 - Precipitation Reactions: Formation of Solids (linked right), I plan to start Section 8.3 - Reactions in Aqueous Solution. We will also take Quiz #13. I am hoping we will have time next week to carry out the second food laboratory - but only if we can make enough headway in Chapter 9. Whatever is not completely covered in Chapter 9 by December 11th will become a screencast you will have to watch and be responsible for - as I am not in a position to postpone any Chapter 9 material to after the Christmas break. You are all scheduled to take a test covering Chapters 7, 8, and 9, scan and email the Answer Sheet by Friday, December 14th.
So that you are adequately prepared for classes next week, please complete the following:
Tuesday, December 4th:
  1. ​Due in class: Quiz #12 (handed out Tuesday).
  2. Print out: Sweet Science of Candymaking Article (linked right).
  3. Print out: Sweet Science of Candymaking Worksheet (linked right).
  4. Print out and bring to class: Fantasy Fudge Protocol (linked right). Try to answer the Prelab questions before you come to class.
  5. Print out and bring to class: Lab: Precipitation Reactions: Formation of Solids.
  6. Please start reading Chapter 8 and complete the homework problems as you go along. The homework will not be due until December 11th.

Trimester 2 Schedule

Below I have included an agenda for classes up through the Christmas Break. When I queried the class concerning the preference for laboratory time in class versus discussion - the class overwhelmingly desired laboratory time (yay!). Then, when you were all asked whether you would find food labs more interesting than traditional chemistry labs, again your preference for food labs was nearly unanimous.  Note there are two food labs coming up in December, along with a traditional chemistry lab.