Embedded Files
Unit 1 TESTS will be the first week in October. Review materials are available HERE already. Start studying!
Other Video Content Videos
Other Video Content Videos
These videos are NOT required, but do offer a different perspective on the topic if that helps!
Khan Academy - some examples balancing chemical reactions by Sal Kahn. His process gets a lot of positive feedback. Check this out if you are struggling with the balancing process!
Bozeman Science - another big player in the chem videos space, Paul Andersen, provides a very visual way of showing what happens during the reaction balancing process, as well as why we need to do it. This vid is very helpful if you need to see the science as opposed to going over more examples.
sciencepost - Not a very fancy vid, but a great demo of the use of the atom inventory to balance. Lots of solid examples worked through here.
Tyler DeWitt - More examples worked through. Tyler is another very famous person in the chem video world. Check out his channel for help throughout the year!
Written Content
Written Content
The links below are sites with written descriptions of this content. Some prefer to learn from reading rather than watching. If that helps you these resources can be useful!
LibreTexts - a very detailed discussion of what chemical reactions are, why they need to be balanced, and how to do that balancing. They attempt to break it down into a step-wise process which is difficult, but overall they do a decent job. The examples are exceptional with a very detailed explanation of what and why they did each part of the process.
Lumen Learning - A slightly different approach, but the same information here. Instead of the steps Lumen Learning demonstrates balancing with data in tables. This more math-y approach justifies why we have to balance. If you are not interested in the math, there is a great list of example problems with answers at the bottom.
Balance the reactions in the linked worksheet above. They range in difficulty from easy to pretty challenging as you progress through the document!
Balancing reactions can be challenging for some. If you are looking for extra practice try the Cavalcade 'o Chemistry website or this online quiz from the folks at Jefferson Labs. These problems are all OPTIONAL!!
In this lab activity you will be making H2 rockets. Using the correct balanced chemical reaction, you will determine the best ratio of H2 fuel to O2 oxidizer to maximize the distance your rocket shoots. Should be a great demo of why we balance reactions as well as a lot of noisy, shooty fun!
This is a fairly complex procedure with a lot of steps. It is best to spread this work over a few classes. The procedure is broken down into sections. Use these natural break points to split up the work.
Mastery Quiz
Mastery Quiz
To prove mastery of this topic you will need to take a quiz on Schoology. Here are the guidelines:
You must show me all the completed work for this section BEFORE you you can start attempts on this quiz.
You CANNOT use any notes, practice, or prior quiz attempts to help you complete the quiz. This quiz is CLOSED NOTES!
You CANNOT work with others on the quiz.
You CAN use ANY class resources like a calculator, your periodic table, or any other reference materials. These are often lined on the quiz itself.
You should also have you Nomenclature Summary Doc you made for ht lab activity in this section.
You have 5 attempts to pass this quiz.
Do NOT take multiple attempts at once if you are not sure why you got questions wrong.
Do NOT take another attempt if you got the same grade again.
DO see Mr. Kiefer for help and to go over previous quiz attempts.
You should only need 2-3 tries for each quiz. If it takes more than that you should be reaching out for help!
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