Lesson 3
Extension Redox
Learning Intention: Expand your redox justification with oxidation numbers and process how to do complex redox equations.
Success Criteria
6. I can use oxidation numbers as a part of my justification for how I have identified oxidation and reduction.
* Not required as justification can reach M & E with just the justification with electron number transfer, but good to still do because it can be used as additional backup evidence. It will also be something that Ms Garlick is looking for when deciding Top Level 2 Chemistry Scholar.
9. I can balance complex half and full redox equations (reactions that required H2O and H+ for balancing).
*Also something Ms Garlick is looking for when deciding Top Level 2 Chemistry Scholar.
Learning Tasks
Do Now - Aluminium, a shiny grey metal, is burned in chloride, a green gas to form aluminium chloride (AlCl3 - note ion charges are Al3+ and Cl-). Identify the oxidation and reduction halves, and their equations, and combine them together to form a full equation. (Answer)
Complete the following sciPAD pages for pre-learning.
Oxidation Numbers (page 100)
Using Oxidation Numbers (page 101)
Listen to Ms Garlick give notes on how to use oxidation numbers with burning hydrogen gas with oxygen reaction from Lesson 2.
Decision time. If you're not aiming to be Level 2 Chemistry Top Scholar, go back to Lesson 2 and work on task 6 to do practice problems that will be similar to the ones you'll get on the internal.
If you are aiming to be Level 2 Chemistry Top Scholar, continue with the tasks for this lesson.
4. Complete the following sciPAD pages for pre-learning.
Complex Half Equations (pages 104-105)
Complicated Redox Equations (pages 111-113)
5. Ms Garlick will give notes for the small group of students that want to do the Top Scholar Question. This will likely happen on Monday, so do complete the pre-learning by then so you're ready.
6. Work on writing up complex redox answers on the Assessment Template. Remember, you will not be assessed on these type of questions, but Ms Garlick will give you one as practice in assessment conditions if you're aiming to be the Level 2 Chemistry Top Scholar.
Potassium permanganate, a purple solution, is added to iron (ii) sulfate, a green solution. The solution changes to a pale orange. *note, you can ask Ms Garlick for these chemicals if you want to see this reaction.
Potassium dichromate, an orange solution, is added to iron (ii) sulfate, a green solution. The solution changes to a green colour. *note, you can ask Ms Garlick for these chemicals if you want to see this reaction.
Burning hydrogen in oxygen to form water. (You did this reaction when you collected the hydrogen gas from the Mg/H2SO4 experiment, aka the pop test)
Burning of propane gas (C3H8) in oxygen forms carbon dioxide and water. All substances are in the gas form and colourless. (This is the reaction that is occuring with the Bunsen burner.)
Homework
Study for tomorrow's the Redox Internal First Attempt
This lesson took place on Thursday, August 30th, 2024, Term 3 Week 6 and Monday, September 2nd, 2024, Term 3 Week 7. The latter is when this page was last updated.