Wed May 22: starting Unit 5 Unit 5 part 1 notes 2018. Only the first three pages of this package today. If you weren’t here today… then you should review this video, and catch up on this simple introductory topic:
ANSWER KEYS:
Check out this video demonstrating the redox reaction between Al (s) and Cu (+2) (aq):
You could use this short video as the intro to a FINAL ESSAY that you could write, to describe absolutely every concept we have learned in the entire Chem 12 course. What an awesome final exam that would be. Could you do it?
Friday May 24, Tuesday May 28, Thursday May 30: Unit 5 continues, working through the balancing redox reactions from package #1. (Mrs. Toombs will demo carefully how to do these questions in class)
BALANCING REDOX IN ACID SOLUTION:
BALANCING REDOX IN BASIC SOLUTION:
ANSWER KEYS:
Chem 12Wkst5.1key Chem 12Wkst5.2Key Chem 12Wkst5.3Key
Monday June 3: Electrochemical cells PACKAGE #2: Unit 5 notes part 2 filled in
Here is a brief video (3 minutes) showing the DANIELL CELL:
Wed June 5: Finishing the Part 2 notes package today: How to choose spontaneous electrochemical reactions and CORROSION and Cathodic Protection.
Sacrificial Zinc Anodes (CATHODIC PROTECTION) for water pumps on RV’s and Boats:
Salt Water vs. Fresh Water
Current flows more easily in salt water than it does in fresh water. This is because salt water, an electrolyte solution, contains more dissolved ions than fresh water, meaning electrons can move more easily. Since rusting is all about the movement of electrons, iron rusts more quickly in salt water than it does in fresh water. Certain metal objects that spend a lot of time submerged in salt water, such as boat engines, rust quickly. However, objects do not have to be completely submerged in salt water for this to happen because increased moisture in the air and salt spray can provide the electrolyte’s cation (positive ions) and anions (negative ions).
POWDER COATING:
How do batteries work: (VIDEO)
How do Lithium Ion rechargeable batteries work (VIDEO)
How do LITHIUM ION BATTERIES WORK? (webpage)
What is the Anode and Cathode in a Lithium rechargeable battery? (webpage)
A 9 minute video showing the Electrochemistry inside alkaline batteries, a galvanic (electrochemical) cell such as the one in our lab activity, and “electroplating” – note that Electroplating is a NONspontaneous ELECTROLYTIC CELL instead of a spontaneous ELECTROCHEMICAL CELL
Friday June 7: ELECTROCHEMICAL CELLS LAB (that we will do all the work and paperwork for, during class time, in TRIOS). This is worth 30 marks.
HAND IN TEXTBOOK any day this week
Tues June 11 or possibly Thursday June 13: Time to finish lab paperwork for those groups who weren’t quite done yet.
A quick peek at Redox Titration:
Thursday June 13: HAND IN YOUR TEXTBOOK BY THE END OF CLASS TODAY.
ELECTROLYSIS (notes package) Unit 5 part 3 notes including Practical applications of Electrolysis. VIDEOS (below).
Look at this brief video (<1 minute) demonstrating ELECTROPLATING:
A 5 minute video explaining ELECTROREFINING in the context of our Chem 12 course (using a typical exam question and our data booklet):
Mon June 17: Block 5 will be going to the Academic Awards Assembly
Block 8: Practice worksheets to check your own understanding (during class time): Ch 12 Electrolysis Chem 12 Electrolytic review ANSWER KEY and Unit 5 Electrochemistry review and Unit 5 review ANSWERS
QUIZ OUTLINE:
Wed June 19: Final Assessment for Unit 5 TODAY. The last mark for the course! Open book. If you have been paying attention to the examples in class throughout this mini unit, you will be completely ready for this “quiz”. It WILL include the last concept of ELECTROLYSIS.
“EXIT SURVEY”:Comments and Feedback to Mrs. T.
Fri June 21: Marks will be given out.
NEAT APPLICATIONS of ELECTROCHEMISTRY:
DISSOLVABLE BATTERIES MADE OF SILK: https://cen.acs.org/articles/95/web/2017/04/Dissolvable-batteries-made-silk.html?utm_source=Facebook&utm_medium=Social&utm_campaign=CEN
HYDROGEN PEROXIDE GENERATORS: https://www.chemistryworld.com/news/hydrogen-peroxide-generator-could-provide-millions-with-clean-water/3007077.article?utm_source=dlvr.it&utm_medium=twitter
BREATHALYZER REDOX CHEMISTRY: https://sites.duke.edu/apep/module-4-alcohol-and-the-breathalyzer-test/content-redox-chemistry-inside-the-breathalyzer/
LUMINOL Demo (Oxidation states!)
A really good 4 minute video about rechargeable batteries:
What a REDOX TITRATION EXPERIMENT LOOKS LIKE:
How to do REDOX TITRATION CALCULATIONS (for those who are interested):
https://www.youtube.com/watch?v=KghqoVTY89w