Most departments are in the process of ordering materials for the 2016-2017 class year. 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, so Order Now!
*Some of you have purchased my lab book – be sure to check out Page 141 !
Past blog posts that may be useful at the end of the school year include:
-Final Exams – End of Year Preparation dated 06/08/2014
- End of Year Activity – Lab Clean-up dated 06/15/2014
- Lab Practical Examination dated 04/30/2015
- Final Exams II dated 06/04/2015
Recently, I’ve found some new applications for the use of waste glass, an inexpensive and plentiful material.
One interesting research development is the containment of nuclear waste in glass for long-term storage.
“At the Hanford nuclear site in eastern [state of] Washington, the U.S. Department of Energy (DOE) is building the world's largest radioactive waste treatment plant for cleanup of 56 million gallons of radioactive and chemical waste. Researchers want to convert the waste, held in underground storage tanks, into durable glass that can be stored for thousands of years.”
“…the researchers are studying materials from the mysterious Broborg hill-fort in Sweden, where a tribe of people around 1,500 years ago melted rocks to strengthen fortifications against invaders. They piled boulders left by ancient glaciers into two large rings, put black amphibolite rocks on top, layered the wall with charcoal and burned it. As the rock melted, it infiltrated the boulders and cooled as glass, acting as glue for the wall.”
Another application using waste glass involves “[a] simple method to convert waste glass into a material which can be used to remove pollutants from contaminated water...”
“A mixture of ground glass, lime and caustic soda is heated to 100 Celsius in a sealed stainless steel container to produce the tobermorite. The mineral, which can be produced as a powder or granules, can be used to absorb toxic heavy metals from water located beneath the ground or waste water streams.”
Why might glass have protective properties?
“Glass is an amorphous material that lacks a long range periodic crystalline structure. Glasses can be formed through several methods but the most common method involves heating raw materials into a molten liquid and then rapidly cooling the liquid in such a way that the atoms remain in a randomly arranged atomic state.”
“Glass is often referred to as a supercooled liquid in that it has no crystallisation or melting point and does not exhibit the phenomenon of the latent heat of crystallisation or fusion”
According to Prof. Juan de Pablo of The Institute for Molecular Engineering at the University of Chicago:
"Glasses are one of the least understood classes of materials…They have the structure of a liquid—disorder—but they're solids. And that's a concept that has mystified people for many decades. So the fact that we can now control the orientation of these disordered materials is something that could have profound theoretical and technological implications. We don't know what they are yet—this is a new field of research and a class of materials that didn't exist before. So we're just at the beginning."
A useful application of Chemistry is in the area of Material Science and these articles focus on a material that is easily obtained and manipulated. Here is another example of scientific knowledge and applications not being finished.
*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.
Happy Memorial Day!