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! :)

WEDNESDAY HOMEWORK really is the work on the syllabus. It’s the limiting reactant problems from yesterday – go back and check your notes and/or watch the vodcast if you are having trouble! Help session?

HON CHEMISTRY 4-15-14 Limiting Reactants from Tammy Skinner on Vimeo.

flickr photo by muffytyrone


HON CHEMISTRY: Wow! Great job today! Here’s your first lecture on reaction stoichiometry. Were you able to apply what you remembered about moles from earlier this year? Don’t forget the keys! Now all you need is some practice and you’ll have it down pat!!

HON CHEMISTRY 4-14-14 Stoichiometry from Tammy Skinner on Vimeo.

CHEMISTRY: Isn’t this a beautiful crystal of copper sulfate pentahydrate? Since we’ve been talking about crystal lattice structures, I thought you might like to see something different than salt!

Here are the notes from Monday – review of some the old homework (yes, I know it wasn’t your homework last night, but I thought you could use the review!!!), a discussion of the properties of ionic vs. covalent compounds and then metallic bonds. Great topics for discussion!!

CHEMISTRY 4-14-14 Ionic vs Covalent & Metallic Bonds from Tammy Skinner on Vimeo.

flickr photo by Tjflex2

How’s it going with the Lost in the Asgard Range Project? Here are a few things to remember – a long list to review, but very important!!

1. Save, save, save, save, save, save, save, to several different places because your computer wants to eat your project!! Email your latest copy to yourself – label it with the date so you’ll know it’s the latest one, or use a flash drive, or Google Dropbox – and use the date thing. And printing out the latest copy is also a great idea!

2. Your printer and the printer at your parents’ job will die/ run out of ink/ jam/ run out of paper/ explode, etc., so don’t wait until the last minute to print things out. And save, save, save, save, save, save, save, to several different places because your computer wants to eat your project!!

3. Make sure you make printed copies of the sources you use from the Internet and any books that aren’t in our library. Copy the first page and the page that you use, and highlight the portions that you use. Staple multiple pages.

4. Always use the title of a website article or the heading of the website page in your internal documentation & your Works Cited if your source is from the Internet. Never use the URL in the internal documentation, but always use the URL in the Works Cited – and you can use just the first part of the URL since the whole thing may be really long.

5. Speaking of that, what you have listed in your internal documentation should be the first thing you have written in each entry of your Works Cited. For example, the author, the name of the book, the Internet title, dictionary entry, etc. Never, never just include the URL for Internet sites in your Works Cited. Include the other important information as well. Follow the MLA guidelines Purdue Owl if you have any questions. And don’t forget to reverse indent your Works Cited!

6. Each time you mention one of the main 32 items in your paper, highlight it so it will be easy to see.

7. Your copied sources should be in the order that the items they refer to occur in your paper. Your Works Cited entries should also be in the order that they occur in your paper.

8. Make sure you write the internal documentation for your illustrations BOTH on your illustration and also in your paper. And don’t forget to include it in the Works Cited!

9. Double check to make sure you don’t have anything in the internal documentation that isn’t in your Works Cited, and vice versa.

May God bless you as you work!! I’m praying for you!!!



CHEMISTRY: Wow – super short class! Hope you enjoyed STEM Track today as much as I did!

Here’s the lecture on ionic bonding – well, the first part anyway. Remember, when you write ionic bonding, you’re not trying to arrange a single structure like you do with Lewis structures. Instead, you’re writing an equation that shows electrons being lost by one atom and gained by another atom. And make sure you put the dots in the right order!

CHEMISTRY 4-10-14 Ionic Bonds from Tammy Skinner on Vimeo.

Image source:nearingzero.net

CHEMISTRY: Hey guys, great job adding the last step to Lewis structures – molecular geometry! Who knew we’d be doing geometry in chemistry?!?

Advice for Lewis structures – don’t forget to count the electrons! And then double check the number of electrons. And when you think it’s right, count the electrons!! :)

Advice for molecular geometry? Make sure you know how to draw Lewis structures, then determine the type of ABE structure and you’ve got it. Easy-peazy!

CHEMISTRY 4-7-14 Molecular Geometry from Tammy Skinner on Vimeo.


UPDATE – The due date has been changed to midnight on Friday, April 25. You’ll write this one up (with photos, data table, etc.) and save it as a PDF in you Google Dropbox.

CHEMISTRY – Here’s special info about the Water Wire Take Home Lab. It may work the first time you make your apparatus and it may not, so give yourself plenty of time. I’m looking forward to hearing about the way you will keep experimenting with ideas to see how to make those light bulbs light up! Do you know, that’s when you often learn the most and grow the strongest – from failure?!

Also, give yourself plenty of time to get your supplies – super important!! You will need to get the light bulb from some place like Radio Shack – that’s the only local place I have found them. Be sure and get your bulb early in case they run out, and you might want to consider an option just in case you blow your light bulb – buy two maybe? One word of advice – try it first with a smaller voltage battery than the 9V battery suggested on the sheets. Last year, we found that the 9V batteries kept blowing the light bulbs. You might also consider getting a light bulb with a higher voltage, but I can’t promise how it will work – especially on the weaker electrolyte solutions.

You’ll also need popsicle sticks and I have skinny popsicle sticks that will work really well, if you’d like to use them.

Don’t forget to also do the last part of the lab – to test five different liquids at your home to see if they are ionic solutions. You will type up this report and save it to your Google Drive as a PDF. Also, don’t forget to include lab photos for each part. You will include all your results in the Observations section of your lab report. It is due by midnight on Wednesday, April 23. Good luck with it, and have fun!

light bulb

CHEMISTRY: Wow! Lewis structures, multiple bonds, and now resonance, and now polyatomic ions! That’s a lot you’ve conquered in the last couple of days!

Here’s some good advice – don’t take shortcuts. Learn the proper steps on the easier molecules, and you’ll be able to do the hard ones. And if it’s still all Greek to you, don’t worry! Keep practicing and you’ll get it, I promise!! Don’t forget to count electrons and don’t forget CONS!

CHEMISTRY 4-4-14 Resonance & Polyatomic Ions from Tammy Skinner on Vimeo.

CHEMISTRY: Great job practicing multiple bonds with Lewis structures today! Here’s the lecture from yesterday on double and triple covalent bonds, with resonance at the end.

Be careful about getting too happy with double bonding – count electrons and don’t forget CONS. And what else? Oh yes, PRACTICE, PRACTICE, PRACTICE! We’ll put one more twist on Lewis structures tomorrow!

Now go forth and conquer the Lewis Structures Worksheet! Be sure and get the updated worksheet. The last compound should be N2O3.

HON CHEMISTRY 2-13-14 Multiple Bonds & Polyatomic Ions from Tammy Skinner on Vimeo.


PHYSICS: So why do instruments that are playing the same note sound so different? Here’s the lecture on harmonics & beats.

PHYSICS 4-2-14 Harmonics & Beats from Tammy Skinner on Vimeo.

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