The early labs include topics of Significant Figures, Density (3 labs), the Separation of a Mixture (including coverage of Percent Composition), and Liquid Chromatography. These are safe labs that cover essential information, giving you time to emphasize Lab Safety and get Lab Safety Contracts signed.
You can buy this lab book for $23 at amazon.com or lulu.com. It will take 1-2 weeks to get to you, so Order Now and you’ll have time with it and decide how to incorporate the labs into your class activities.
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.
*Some of you have already purchased my lab book – be sure to check out Page 141 !
“Conversations about the state of the planet’s climate are often dire and mostly negative, given the human-induced changes to it and the seeming inability to even control the degradation, let alone turn the clock back. And so, it should be cause for cheer that scientists from the University of Illinois at Chicago (UIC) have created a solar cell that converts atmospheric carbon dioxide into a usable fuel.”
“A new type of solar-powered technology has the potential to play a big role in the fight against climate change if its inventors can take it from the laboratory to industrial-scale use... [A] team of scientists announced in the journal Science [on July 28, 2016] that they have created a device that absorbs carbon dioxide from the atmosphere and uses sunlight to break it into a mix of carbon monoxide and hydrogen called synthesis gas or “syngas,” that can be used directly or turned into diesel or other liquid fuels, said Amin Salehi-Khojin, a mechanical engineer at the University of Illinois at Chicago who leads the lab that conducted the research.”
“Unlike conventional solar cells, the new device essentially does the work of plants, converting atmospheric carbon dioxide into fuel, solving two crucial problems at once.
A solar farm of such cells could remove significant amounts of carbon from the atmosphere and produce energy-dense fuel efficiently…
To make carbon dioxide into something that could be a usable fuel, the researchers needed to find a catalyst… ‘Chemical reactions that convert carbon dioxide into burnable forms of carbon are called reduction reactions, the opposite of oxidation or combustion,’ Dr. Salehi-Khojin said.
‘Engineers have been exploring different catalysts to drive carbon dioxide reduction, but so far such reactions have been inefficient and rely on expensive precious metals such as silver.’ …
The best of several catalysts the scientists studied turned out to be tungsten diselenide (WSe2), which they fashioned into nanosized flakes to maximize the surface area and to expose its reactive edges.”
Note the discussion of the search for a catalyst for this reaction, as well as other vocabulary terms you might find useful – in a homework assignment perhaps?
Other research about converting CO2 into a usable fuel has been conducted over the past few years.
“Researchers [in 2010]…presented…experimental evidence of a new solar conversion process, combining electronic and chemical pathways, for carbon dioxide capture in what could become a revolutionary approach to remove and recycle CO2 from the atmosphere on a large scale. Rather than trying to sequester or hide away excess carbon dioxide, this...method allows it to be stored as solid carbon or converted in useful products ranging from plastics to synthetic jet fuel. “
Another method developed at Arizona State University in early 2016 involves “[a] transparent box with what resembles two stacks of lasagna noodles that can be lowered into it. The “pasta” actually contains...a sorbent – an absorptive material. It’s made up of a hard plastic resin – a synthetic analogue of natural substances like amber — that has been crushed into tiny pieces and then embedded in strips of softer plastic…[I]n the open air, it binds to that invisible gas that has caused the world so much trouble — carbon dioxide — and so acts as a kind of sponge to pull it out of the atmosphere.”
It is interesting, and encouraging, that science is now approaching the issue of excess carbon dioxide in the atmosphere which is leading to global climate change, and trying to address it.
*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.
Keep enjoying the last of August!