Conducting experiments with liquid nitrogen experiments is a sure-fire way to energize many chemistry lessons. Unfortunately, getting access to liquid nitrogen can be a bit difficult. I happen to purchase liquid nitrogen from Airgas; you might be able to find a branch near you here.
The “bucket launch” is a fantastic experiment you can do if you have access to liquid nitrogen. Depending upon conditions, we have observed the bucket to launch anywhere from 80 to 160 feet high. See the video.
Engaging and Sustaining Students' Interest in Chemistry
The November 2014 issue of the Journal of Chemical Education is available online to subscribers at http://pubs.acs.org/toc/jceda8/91/11. The November issue content includes content on water chemistry, diversity and women in science, professional development, teaching with technology, electrochemistry, and more.
This worksheet asks students to do basic conversions of mass or molecules to moles and vice versa. The worksheet requires students to complete their work in a particular format and to inlcude number, unit, and chemical identity for each item in the "given," in each conversion factor, and in the answer. It gives students basic practice in this mathematical exercise while inforcing good habits that encourage "unit analysis" (or dimensional analysis).
This worksheet can be used as an in-class or as a homework assignment. The ten items on the first page should take 20 to 30 minutes. The ten items on the second page should take 30 to 50 minutes.
This worksheet is intended to be used as a "Guided Instructional Activity" (GIA). It asks students to find the molar mass of selected elements and write the molar mass as two equivalent fractions ("conversion factors") and as an equality. In each representation, students are forced to give the numeral of the measure, unit, and identity of the chemical.
About 45 minutes.
Physics teachers have AAPT, biology teachers have NABT, and starting this fall, chemistry teachers will have AACT. We are happy to announce that the American Association of Chemistry Teachers (AACT) will be accepting charter members starting on Aug. 4 at BCCE in Grand Rapids, Mich. But if you aren’t attending BCCE, you can join AACT by visiting teachchemistry.org on Aug. 4, and you’ll still have the status of charter member.
ACS Publications—Most Trusted. Most Cited. Most Read
The January 2014 issue marks the start of the 91st volume of the Journal of Chemical Education. This issue plus the content of all past volumes are available online to subscribers at http://pubs.acs.org/jchemeduc. The January 2014 issue will be available as a sample issue for the entire year, so the full text of all articles can be accessed without a subscription. Subscription information is available at http://pubs.acs.org/page/subscribe.html?ref=jceda8.
Changing the Landscape of Chemical Education
The December 2013 issue of the Journal of Chemical Education is available online to subscribers at http://pubs.acs.org/toc/jceda8/90/12. This issue of JCE plus the content of all past issues, volumes 1 through 90, are available to subscribers at http://pubs.acs.org/jchemeduc.