The book Chemistry on a Budget contains inexpensive chemistry labs that could be useful. You can buy this lab book for $23 at amazon.com or lulu.com. Check it out!
There are two versions of each lab, one with a ten-question conclusion and one with directions for a full lab report. This way the teacher has the option! Each lab is two pages to allow for one two-sided handout.
It will take a week or so to get to you.
*Some of you have purchased my lab book – be sure to check out Page 141 !
In visualizing atoms and the electrons involved in Bonding, animations and simulations are useful in aiding your students to grasp various concepts.
A simple demonstration to aid in visualizing molecular bond polarity involves:
-two jump ropes (5-6’ each, available in most toy stores)
-a manila folder (a piece of construction or regular paper would be sufficient)
-2 student volunteers
Tie the two jump ropes together. Label the folder “e- e-“ with large letters, maybe a bright color – this will represent the pair of electrons in the bond.
Each of the two students will hold an end of each jump rope so that it is stretched flat in the air, similar to a tight rope. The folder can be placed hanging on the jump rope and the teacher can move it back and forth in a discussion of Polar and Nonpolar Covalent bonds.
Student access to a chart of electronegativities is useful for practicing prediction of polarity.
Here is one example:
You could present the students with various combinations and they predict the polarity of the bonds using electronegativites. Present an example, and a student with an answer places the electron pair (folder) on the bond (jump rope).
Here is a worksheet you could use as a guide:
I know that this is simple, but this gets the students involved and active in the chemistry content being presented.
Past blog posts that you may find helpful include:
-Lewis Structures and VSEPR Theory on 03/09/2014
-Polarity and Intermolecular Forces on 03/12/2014
-VSEPR Theory Labs & Resources on 03/19/2015
*This Blog contains several entries that would be helpful to your chemistry classroom. Check out the Topic List to help you to find past Blog entries.
Also, Write To Me about your successes, challenges, or questions in the Chemistry Classroom.
Remember, buying a copy of the lab book Chemistry on a Budget can be very useful to your Chemistry classroom with labs and class article ideas.
Enjoy the best of July!