Wow, the school year is rapidly ending. This is a big week before the Memorial Day weekend!
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 !
At this point in the school year, students may be seeking out sources of Extra Credit. It is your decision if students must have all assignments completed before being able to earn Extra Credit.
One current research development has been the use of urine to produce electricity.
“Today, over seven billion people populate our planet, which means on average around 10.5 billion litres (2.8 billion gallons) of human urine is produced and wasted each day …
With around one-seventh of the population lacking access to basic electricity, and as our global supply of oil slowly dwindles and coal continues to add to mounting greenhouse gases, scientists have rushed to find solutions to power the world in more renewable and sustainable ways. “
“A microbial fuel cell [MFC] is essentially an energy converter, which uses bacteria found in nature to breakdown organic matter, and in turn produce electrons that are converted into energy. It’s a self-renewing system, because the more waste the microbes eat, the more energy the system can generate and for longer.”
“[This] new kind of fuel cell that can turn urine into electricity could revolutionize the way we produce bioenergy, particularly in developing countries.”
“The research team from the University [of Bath]’s Department of Chemical Engineering, Department of Chemistry and the Centre for Sustainable Chemical Technologies (CSCT), have worked with Queen Mary University of London and the Bristol Bioenergy Centre, to devise this new kind of microbial fuel cell that is smaller, more powerful and cheaper than other similar devices.”
“This novel fuel cell developed by the researchers, measures one inch squared in size and uses a carbon catalyst at the cathode which is derived from glucose and ovalbumin, a protein found in egg white. This biomass-derived catalyst is a renewable and much cheaper alternative to platinum, commonly used in other microbial fuel cells.”
You could offer an Extra Credit assignment by providing an article’s website (so you don’t have to photocopy the article) and requiring students to: (1)summarize the article (check that they’re not copying the article’s abstract or introductory paragraph); and, (2) list and define 10 scientific terms used in the article.
You may want to require a handwritten assignment to avoid a “copy and paste” result.
There was another urine powered generator presented in 2012 that was questioned as to its validity:
“…a group of Nigerian teens unveiled a urine-powered generator at Maker Faire Africa in Lagos. … Made of a store-bought generator, a makeshift battery, a couple of water purifiers, a rusty old propane tank and a lightbulb, their invention can evidently provide six hours of electricity with only a liter of urine. “
Doublecheck your articles that they reflect this more current 2016 development.
*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.
Have a great week!