PHYSICS: Wonderful visual today of the difference in angular speed and linear speed! Thanks for playing along!!

So is being unbalanced a bad thing? Here’s the beginning discussion of circular motion.

flickr photo by geoftheref

HON CHEMISTRY: I still say stoichiometry is a lot like baking – sometimes you just have to get in there and get your hands dirty! Here’s an overview of the test and a look at a couple of of the advanced stoichiometry problems. I also found the rusted iron problem work all the way out from last year, so I’m posting that below as well.

Again I want to emphasize – the majority of the test is basic reaction stoichiomety, limiting reactants and percent yield. Be sure and give that the most of your study time!

Also, review writing and balancing chemical reactions. Most of the stoichiometry problems will require that you begin by doing just that! There will be just one extra jumbo large problem. You’ve got this!! 🙂

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Rusted Iron Problem Worked Out:

Photo by Meritt Thomas on Unsplash

HON 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. Lots easier that limiting reactants I think. You realize what we’ve done… we’ve finished the chapter!! Now let’s see if you can apply what you know – good times!

PHYSICS: Ohhhhhhhhh….so that’s how they can walk across that line! Wait – why do they keep moving their bodies?? Great opportunities for discussion and application!?!

Here’s the discussion from today on how stability relates to center of mass. At the beginning, a quick look at a couple of torque problems from the homework, Torque Worksheet 2.

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PHYSICS: Great job with asymmetrical Christmas trees and rotational equilibrium!! Here’s a look at putting rotational equilibrium together with translational equilibrium. The beginning of good times!

CHEMISTRY: Okay, maybe balancing equations isn’t exactly like this, but…..

Great practice today! Do you feel better about balancing equations? Here’s a short review of some of the equations from today.

flickr photo by D. Sharon Pruitt, Pink Sherbet Photography

CHEMISTRY: So you learned last semester how to determine if a chemical reaction has taken place. How would you go about describing a chemical reaction to someone? Here’s our discussion from today on writing balanced chemical equations!

HW UPDATE: On The Physics Classroom assignment for tonight, you do not have to do the last part – Chemical Reaction types. You only have to do Balancing Chemical Equations – complete only 2 levels: Apprentice and Wizard

First step in writing equations? Make sure you can write chemical formulas! First step to that? Memorization!!

So tell me again – how do you know if a chemical reaction has occurred?

HON 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! 🙂

HW UPDATE: For Thursday night – Pg. 311 – 314: 25d, 26c, 27b, 35, 40 (only find one product on 25 & 26) – due tomorrow. Lab report for Gases lab is changed to due Saturday, 11:59 PM.

CHEMISTRY: God bless you as you study! Here’s our great overview of the test from today and a look at some chemical names and formulas and oxidation numbers. Did you find the Chapter 7 Stuff to Know sheet? Be sure and use it as a road map for your studying. I know it seems like a lot, but you can do it!

First priority – make sure that you have memorized EVERYTHING. Then, practice!!! Go to the Physics Classroom as a guest, sciencegeek.net and make sure you can write and name chemical formulas. Practice, practice, practice!!! Then start practicing the different kinds of problems – do at least three of each one of them. And also try those on sciencegeek.net. That’s always some good practice. And don’t forget about polymers!

I’ll be praying for you! You can do it!!

Photo by Artem Bryzgalov on Unsplash

CHEMISTRY: You’ve finished the chapter, now it’s time to practice what you’ve learned – and there is A LOT! Great idea to check out the Chapter 7 ALL Stuff to Know Sheet here on the class website.

For Friday, you’ll be doing the Ch 7 Online Review Worksheet on Canvas. (Click on Quizzes and then Practice Quizzes.) There are 44 total questions, but 6 of them are problems to work out. You can have two attempts on the worksheet and your grade will be the average of your two scores. It’s now due this coming Monday at 8:00 AM (that’s an update!).

CAUTION: It’s long, so don’t start it unless you have at least 50 minutes to finish. It could take longer if you have to go back to your notes to look up how to do things. Also, read the following IMPORTANT instructions before you begin. And don’t forget you’ll have to turn in written work for the problems.

IMPORTANT #1: READ BEFORE STARTING. To type in your answers, make sure of the following. If you get an answer wrong because of the way you typed it, I won’t go back and change your grade.

Capitalization – don’t capitalize any thing EXCEPT symbol letters that are supposed to be upper case. So don’t capitalize names for elements or compounds.
Roman numerals – DO put a space between the element name and the Roman numeral and CAPITALIZE I and V. Like this: titanium (IV) oxide
Ion charges & oxidation numbers – You don’t include ion charges when you write formulas, but YOU DO write charges if you are writing the formula or oxidation number for an ion. Don’t put a space between the number and the charge. Like this: +2
Units – Put a space between a number and the unit. Write the symbol, not the word for the unit.
Double check your spelling!!

IMPORTANT #2: For the problems section, work the problem correctly and completely on notebook paper and turn in the notebook paper in class. You won’t receive credit for the problems if you don’t turn in your work. FYI – there are 6 problems.