Chemistry 12-6-19 Polymers

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.

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


Image source: http://www.packtech.ca/pb/images/img32161428fffbe41e07.jpg

Chemistry 12-4-19 Molecular Formulas

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!

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 12-3-19 Empirical Formulas

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! ๐Ÿ™‚


Image source www.dnr.mo.gov/env/esp/images/prettytesttubes.jpg

Chemistry 12-2-19 Percent Composition

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! ๐Ÿ™‚


flickr photo by ฮคฯŠฮถฮถยฅ

Chemistry 11-19-19 Formula Mass & Molar Mass & Molecules

CHEMISTRY: So the little mole turns out to be a pretty big deal – and a very handy tool!!

Great job today! Here’s discussion on formula mass and molar mass, and then using molar mass and Avogadro’s number as a conversion factor. You’ve got a couple of great tools – so now think through the problems and go forth and conquer!! Be sure and practice them so you don’t forget!


Photo by ahmad kanbar on Unsplash

Chemistry 11-14-19 Moles, Mass, Atoms & Avogadro

CHEMISTRY: So… how big a bucket do you think we’d need to hold a mole of frogs? ๐Ÿ™‚

Nope, not the furry brown creature that burrows underground, it’s a whole different thing! Here’s the lecture from Friday on moles, mass, and Avogadro’s number. I still say he has a cool name… ๐Ÿ™‚


flickr photo by Thomas Hawk

Chemistry 11-11-19 Oxidation Numbers & Pre-Test Quiz Info

CHEMISTRY: One man’s rust is another student’s lesson in chemistry! Great job today with oxidation numbers. Now it’s time to go and practice applying them!

God bless you as you study for the Chapter 7 Memorization Quiz for Wednesday! You need to have memorized (and be able to use!!): polyatomic ions, monatomic ions (but you can get these off the periodic table), acids, prefixes, and how to write and name chemical formulas. Click here for a copy of the PERIODIC TABLE you’ll use on the test – if you want to practice using it on your own.

That’s a lot, but you can do it! And make double dog sure you are working hard at practicing it all now!!


flickr photo by scottwillis

Chemistry 11-8-19 Binary Molecular Formulas

CHEMISTRY: Do you feel like you have letter and numbers swimming in your eyes? This is one of those times that paying attention to details is super, super important! Here’s the lecture from today on writing formulas and names for binary molecular compounds. Part of it’s really similar to what you learned to do last week for ionic compounds, but another part is totally different. Details!!

Make sure you keep everything straight. Do something that will organize all the information for you, so you won’t get confused. Also, don’t forget the lists you have to memorize – it’s getting larger and larger!! And practice, practice, practice!!!

Need extra practice? Another help session??


flickr photo by Roger Smith

Chemistry 11-5-19 Chemical Formulas with Polyatomic Ions

CHEMISTRY: Great job today! Do you understand better now? Remember it’s like baby steps, first binary ionic compounds, and now, formulas with polyatomic ions. Begin learning how to do them now! And practice, practice, practice!!

Speaking of – how are you doing with polyatomic ion memorization? Quiz tomorrow!

Another great idea, click here for a copy of the Hints for Naming Chemical Formulas Flow Chart, or find it under the Worksheet/Handouts Tab. Follow it every time you name chemical formulas!!


flickr photo by skycaptaintwo

Chemistry 11-1-19 Intro to Chemical Names & Formulas

CHEMISTRY: Great job learning to name binary ionic compounds – and even beginning to write formulas! Next Tuesday, let’s add polyatomic ions! Whoot, whoot!!

Speaking of formulas, what is your plan for all the memorization in this chapter? Word of warning – don’t wait to the last minute!!

Super important – the secret for the next few days and this entire chapter is DON’T GET BEHIND! Keep up with me and practice, practice, practice!