Hon Chemistry 3-28-13 Decomposition & Single Replacement Reactions

HON CHEMISTRY: Happy Easter! Here’s a lecture from today on decomposition and single replacement reactions – and you got a head start on the activity series.

This makes 15 reactions so far, and we’ll do the rest Tuesday. Careful though, don’t just memorize them. Make sure you can apply them as well. When you start to work any equation, first determine what type of reaction it is, then figure out what rule applies and follow it to determine the products. I believe in you! You can do it!!


flickr photo by bobtravis

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Chemistry 3-28-13 Ionic Vs. Covalent Bonds

CHEMISTRY: Happy Easter! 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 Thursday – review of some the homework and then a discussion of the properties of ionic vs. covalent compounds. Great topics for discussion!!


flickr photo by Tjflex2

Chemistry 3-27-13 Ionic Bonds

CHEMISTRY: Wow – super short class! 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. Make sure you put the dots in the right order. We’ll finish metallic bonds tomorrow.

UPDATE: Here’s an updated vodcast on ionic bonds – hopefully the sound will work on this one.


Image source:nearingzero.net

Hon Chemistry 3-26-13 Balancing Chemical Equations Practice

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

For Sonal – here’s the practice we did on balancing equations today. We miss you!! πŸ™‚


flickr photo by D. Sharon Pruitt, Pink Sherbet Photography
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Hon Chemistry 3-25-13 Describing Chemical Reactions

HON CHEMISTRY: So tell me again – how do you know if a chemical reaction has occurred? Poor red gummy bear! Here’s the lecture from the evidences of a chemical change and the intro to balancing chemical equations. Great to be back to chemistry!
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flickr photo by vmaddalena

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Chemistry 3-25-13 Polyatomic Ions & Molecular Geometry

CHEMISTRY: Hey guys, great job adding the next step to Lewis structures with polyatomic ions – and now molecular geometry! Who knew we’d be doing geometry in chemistry?!? Here’s the lecture on both from today.

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!! πŸ™‚

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! Meet you in the computer lab tomorrow!


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Chemistry 3-22-13 Multiple Covalent Bonds

CHEMISTRY: Happy weekend! Here the short, short lecture from Friday 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 Monday!

Homework changed to redo the Lewis Structure worksheet – and work on your project! πŸ™‚