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!

HELP SESSION Thursday morning, 7:30 AM.

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

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CHEMISTRY: We finally finished the chapter! Did you realize molecules could be that large? And so many of them. But don’t you think polymers are cool? Here’s the lecture for Tuesday.

UPDATE: Test has been changed to THIS Thursday. Help session Thursday morning, 7:30 AM.

Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe? Hmmmmm…

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CHEMISTRY: Great job today looking back the problems from chapter 7. Today we reviewed molecular and empirical formulas, percent composition, and mole problems. Did you remember how to do them? We also took a quick look back at naming chemical formulas. Be sure and practice, practice, practice it all for the test!

Speaking of which, have you looked at the Chapter 7 Stuff to Know Sheet? Good stuff there!

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CHEMISTRY: Hey guys! Awesome job with empirical formulas, and now you’ve conquered writing molecular formulas! Here’s the lecture from Wednesday. It’s just like writing empirical formulas but with a twist at the end!

HW UPDATE: All the rest of the homework that was for Tuesday is now due Friday. The homework that is on the syllabus for Thursday (the five extra problems) is changed for now and will be due next week.

Have you started preparing for the test? It will be over ALL of chapter – plus the small bit from chapter 3. Be sure and checked out the Stuff to Know sheet for all of chapter 7 under the Test Info tab!

flickr photo by Sebastian Mary

CHEMISTRY: So, would you like to be Greg on CSI? Great work with empirical formulas today!

The hardest part is that it’s not a set formula for you to plug and play, but if you’ll keep in mind that you’re really just looking for subscripts which are just moles, you’ll be able to think it through. Percent to mass, mass to moles, moles to smallest whole number ratio.

Let’s crank it up a notch tomorrow! 🙂

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CHEMISTRY: Great job today! Way to apply chemistry to your everyday life!!

I think you’ll find that percent composition problems are super easy to catch on to. First, though, be sure you know which “type” of percent composition you’re trying to fine. Also make sure you can write chemical formulas (I won’t give them to you!) and that you’ve memorized the formulas for acids and those chemical names and formulas for common substances. It’s just plug and play from there! 🙂

flickr photo by Τϊζζ¥