Chemistry 2-29-24 Chapter 9 Test Overview & Practice

CHEMISTRY: Great job today! Have you figure out the path for working stoichiometry problems? Here’s our overview of the test – sample multiple choice, a percent yield problems, and a big mama extra large problem.

Now go forth and practice, practice, practice! God bless you as you study and prepare!

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Chemistry 2-28-24 Advanced Stoichiometry & a Quick Look at the Test

CHEMISTRY: I still say stoichiometry is a lot like baking – sometimes you just have to get in there and get your hands dirty! We began class with something super important – a quick look at the test. And then here’s our look at #35 and #32 – the gypsum problem and the baking powder problem. Thinking through these problems is a huge first important step!

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Chemistry 2-27-24 Percent Yield

CHEMISTRY: So are you a cookie dough lover? Not me – I like my cookies crispy!

Here’s the last of the applications of stoichiometry problems – percent yield. Be careful to remember that percent yield is all about product. The masses in the formula will be from products. The masses of the reactants will only be used to find the mass of the product.

HW UPDATE: Correct page numbers for tonight’s HW are • Pg. R113 – 114; 224b, 225a, 227a,b AND Pg. 311 – 314: 32*, 35*, 40

You realize what we’ve done… we’ve finished the chapter!!

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Physics 2-23-24 Pascal’s Law

PHYSICS: Did you realize that fluids could produce that much force? Make’s you wonder at the awesome way God designed those beautiful under water sea creatures to withstand so much pressure, doesn’t it? This little creature is a lionfish from the waters of Lembeh, Indonesia.

Here’s the lecture on Pascal’s law and hydraulics and the like.

Physics 2-27-17 Pascal's Law from Tammy Skinner on Vimeo.

flickr photo by CW Ye

Chemistry 2-22-24 Stoichiometry & Limiting Reactants

CHEMISTRY: So if you have 11 roller wheels, how many roller blade skates can you make? You know, really, limiting reactant is almost that simple. Well, the concept is anyway! You deal with limiting reactants in your life all the time. Now we’re just applying that same concept with chemical reactions! 🙂

Here’s our lesson from Thursday on limiting reactants. Fun times!

flickr photo by muffytyrone

  • Hon Chemistry 2-22-24 Nuclear Reactors, Fission & Fusion

    HON CHEMISTRY: Wow! What do you think about fission and fusion? Can you now begin to understand the destructive force of the hydrogen bomb? It’s a fusion bomb! Just another reason you might not want to plan a trip to the sun!!

    We put the final touch on a lot today, and guess what? We’ve wrapped up the chapter! How are you doing on studying for the test? It will cover the beginning part of chapter 3 (through average atomic mass) and chapter 21. Did you find the Stuff to Know Sheet?

    Practice everything! And did I mention, PRACTICE!! I’ll be praying for you!

    Hon Chemistry 12-7-16 Isotopes, Nuclear Reactors, and Fusion from Tammy Skinner on Vimeo.

    Chemistry 2-21-24 Stoichiometry Homework

    CHEMISTRY: So how did you do with the stoichiometry problems on your own? Do you find that working these problem is kind of like following a map – and making sure you have the right passport before you try to get in to the next country?!

    Good job today! Here’s a look at some of the problems from homework last night. Be sure and get the answers at the beginning so you can go back and work these problems and more to practice for the test!

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    Hon Chemistry 2-21-24 Applications of Radioactivity, Pt. 2

    HON CHEMISTRY: Hey guys! Here’s the laaaast of the applications of radioactive isotopes. The Lord willing, we’ll finish fission and fusion on Monday.

    How are you studying? Be careful and don’t take the test for granted! And don’t forget to check out the the Chapter 21 Stuff to Know & sheet (and yes, there actually is one!).

    Make sure you keep practicing half-life problems and nuclear equations. Also, make sure you’ve memorize the nuclear symbols for alpha particles, beta particles, positrons, neutrons, and protons. And then there are tons of notes on the conceptual stuff. Properties of radioactivity, people, types of radioactive decay, applications of radioactivity, definitions, definitions, and definitions!

    FYI – This is a pic of a test used to check on blood flow through the heart during a stress test. Fun, huh!?

    So what’s this about you probably having an radioactive isotope in your house?!? Don’t forget to research how smoke detectors, especially those with Americium, work!

    Image source

    Chemistry 2-20-24 Stoichiometry

    CHEMISTRY: Wow!! Great job today with stoichiometry!! Now it’s time to put everything you’ve learned from the last few chapters together. It’s like cooking – figuring out what you need to get what you want. Slightly different ingredients, though. Don’t forget molar mass and mole ratio!

    HW INFO – To find the pages for tonight’s homework, either go the the Textbook HW Tab and you’ll find the pages there. Also you can go to the online textbook, open the chapter, and then in the section where you can enter page numbers, enter R109. Either of these will take you to the pages for tonight’s homework.

    Photo by Monika Grabkowska on Unsplash