electrochemistry

Build Your Own Hoffman Apparatus

DYI Hoffman Apparatus

Chad Hustings blogged this past school year about building his own Hoffman apparatus for each group of students. I have been using a Hoffman apparatus that had been purchased by my district before I began teaching there over 20 years ago to demonstrate electrolysis of water, but providing each student group with the ability to perform an electrolysis themselves is a powerful activity. I have used a different version of a homemade Hoffman apparatus, but after reading Chad's blog post, I decided to use a version close to his.  

Time required: 

If the Hoffman apparatus is built ahead of time (this takes about 5 minutes for each one if the teacher builds them), then the activity and discussion should take less than a 45 minute period.  

Silver Plated Ornaments

silver ornaments

I have used several different versions of the Silver Mirror or Tollen's Test lab. I am sharing the method that has proven to be the most reliable for me. The solutions should be made fresh, the directions must be followed closely and timing is very important. I like the fact that relatively small amounts of the chemicals are required, but as always you must be vigilant with safety precautions. 

Time required: 

15 minutes of prep time and 20 minutes of class time if you have multiple hoods available for students to use. I only have one hood, so I have another activity for students to complete while two groups rotate through the lab over two 60 minute class periods. 

An easy copper electroplating demo for your redox unit

Simple Electroplating Demonstration

My IB seniors are just wrapping up our unit on electrochemistry and redox. This has always been a challenging topic within the IB curriculum. Admittedly, electrochemistry has not ever been my strong suit either, so this year I aimed to strengthen the unit with two additional demonstrations.

JCE 93.11 November 2016 Issue Highlights

Journal of Chemical Education November 2016

Analytical Thinking, Analytical Action

The November 2016 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: electrochemistry; researching how assessment aids learning; using technology to teach; environmental chemistry; hands-on, minds-on activities and demonstrations; geology-inspired chemistry.

JCE 93.07 July 2016 Issue Highlights

Journal of Chemical Education July 2016

Exploration of Instrument Design and Performance

The July 2016 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: cost-effective instrumentation, including 3D printed instruments and low-cost spectroscopy; laboratory instrumentation and equipment; effective teaching assistants in chemistry; laboratory experiments; resources for teaching; puzzles and games to introduce the periodic table.

Using Chemistry to Find that Silver Lining

Silver plate: before and after

The chemistry of silver and the process in which silver becomes tarnished is explored. Take a new look at an old JCE Classroom Activity.

JCE 92.10 October 2015 Issue Highlights

Journal of Chemical Education October 2015 Cover

Celebrating National Chemistry Week 2015: Chemistry Colors Our World

The October 2015 issue of the Journal of Chemical Education is now available online to subscribers. National Chemistry Week, a community-based annual event uniting ACS local sections, businesses, schools, and individuals in communicating the value of chemistry in our everyday life, is being celebrated October 18–24, 2015 with the theme “Chemistry Colors Our World”. Articles in this issue can help you make the most of this annual celebration.

JCE 92.09—September 2015 Issue Highlights

Journal of Chemical Education September 2015 Cover

Effective Student Engagement

The September 2015 issue of the Journal of Chemical Education is now available online to subscribers. This issue includes articles on flipped classroom; introductory and general chemistry; organic chemistry activities; biochemistry demonstrations and labs; computer-based learning; chemical education research; from the archive: chemistry in context.

JCE 91.11—November 2014 Issue Highlights

Journal of Chemical Education November 2014 Cover

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.